Details of the Researcher

PHOTO

Kazuo Takimiya
Section
Graduate School of Science
Job title
Professor
Degree

  • 博士（工学）（広島大学）

  • 工学修士（広島大学）

Researcher ID
A-5841-2010

Research History 8

  • 2018/04 - Present
    理化学研究所　創発物性科学研究センター　チームリーダー

  • 2017/04 - Present
    Tohoku University　Graduate School of Science

  • 2013/04 - 2018/03
    理化学研究所　創発物性科学研究センター　グループディレクター

  • 2007/04 - 2013/03
    Hiroshima University　Graduate School of Engineering

  • 2003/07 - 2007/03
    Hiroshima University　Graduate School of Engineering

  • 1994/06 - 2003/06
    Hiroshima University　Graduate School of Engineering

  • 1994/04 - 1994/05
    日本学術振興会　特別研究員（PD)

  • 1993/04 - 1994/03
    日本学術振興会　特別研究員（DC2)

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Education 2

  • Hiroshima University　Graduate School of Engineering

    1989/04 - 1994/03

  • Hiroshima University　Faculty of Engineering　Cluster 3 (Chemistry, Biotechnology and Process Engineering)

    1985/04 - 1989/03

Professional Memberships 4

  • 米国化学会

  • THE JAPAN SOCIETY OF APPLIED PHYSICS

  • THE SOCIETY OF SYNTHETIC ORGANIC CHEMISTRY, JAPAN

  • THE CHEMICAL SOCIETY OF JAPAN

Research Interests 4

  • 有機半導体デバイス

  • 有機合成化学

  • 有機半導体

  • 有機機能化学

Research Areas 1

  • Nanotechnology/Materials / Organic functional materials /

Awards 6

  1. 学術賞

    2015/03　日本化学会　複素芳香族を基盤とした高性能有機半導体の創製と応用に関する研究

  2. BCSJ Award Article

    2011

  3. BCSJ Award Article

    2010

  4. DIC機能材料賞

    2008　有機合成化学協会

  5. 若い世代の特別講演

    2000　日本化学会

  6. 研究企画賞

    1996　有機合成化学協会

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Papers 452

  1. Core- versus End-Alkylation: Tailoring Solid-State Structures and Properties of Near-Infrared-Absorbing Organic Semiconductors Based on Naphthodithiophenediones

    Kohsuke Kawabata, Kiyohito Mashimo, Kazuo Takimiya

    Chemistry of Materials　2024/12/04

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.chemmater.4c02436 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  2. Quinoidal π-extension of dipyranylidene derivatives: towards efficient dopants for n-type organic semiconductors

    Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

    Organic Chemistry Frontiers　11　(17)　4682-4688　2024/07/03

    DOI： 10.1039/d4qo00961d 　

    ISSN： 2052-4110

    eISSN： 2052-4129

  3. A Novel N-Type Molecular Dopant With a Closed-Shell Electronic Structure Applicable to the Vacuum-Deposition Process. International-journal

    Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

    Advanced materials (Deerfield Beach, Fla.)　36　(15)　e2311047　2024/04

    DOI： 10.1002/adma.202311047 　

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    Rational design, synthesis, and characterization of a new efficient versatile n-type dopant with a closed-shell electronic structure are described. By employing the tetraphenyl-dipyranylidene (DP0) framework with two 7π-electron systems modified with N,N-dimethylamino groups as the strong electron-donating substituent, 2,2',6,6'-tetrakis[4-(dimethylamino)phenyl]-4,4'-dipyranylidene (DP7), a closed-shell molecule with an extremely high-lying energy level of the highest occupied molecular orbital, close to 4.0 eV below the vacuum level, is successfully developed. Thanks to its thermal stability, DP7 is applicable to vacuum deposition, which allows utilization of DP7 in bulk doping for the development of n-type organic thermoelectric materials and contact doping for reducing contact resistance in n-type organic field-effect transistors. As vacuum-deposition processable n-type dopants are very limited, DP7 stands out as a useful n-type dopant, particularly for the latter purpose.

  4. Crystal-Structure Control of Molecular Semiconductors by Methylthiolation: Toward Ultrahigh Mobility. International-journal

    Kazuo Takimiya, Kirill Bulgarevich, Kohsuke Kawabata

    Accounts of chemical research　57　(6)　884-894　2024/03/19

    DOI： 10.1021/acs.accounts.3c00756 　

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    ConspectusThe crystal structure of organic semiconductors has been regarded as one of the crucial factors for realizing high-performance electronic devices, such as organic field-effect transistors. However, although the control of crystal structures of organic semiconductors has been examined in the last two decades of intensive efforts of the development of organic semiconductors, active measures to control crystal structures enabling high carrier mobility are still limited. In 2016, our research group noticed that regioselective methylthiolation could provide a selective crystal structure change from an ordinary herringbone structure to a pitched π-stacking structure, similar to the crystal structure of rubrene, in the benzo[1,2-b:4,5-b']dithiophene (BDT) system. Following this serendipitous finding, our group systematically investigated the relationship between the molecular and crystal structures of a range of methylthiolated aromatic and heteroaromatic compounds.This Account provides a comprehensive overview of our research efforts and advancements in the development of methylthiolated small-molecule-based organic semiconductors (molecular semiconductors). We first describe the outline of the past development of molecular semiconductors, focusing on the types of crystal structures of high-performance molecular semiconductors. Then, we describe our findings on the drastic crystal structure change in the BDT system upon methylthiolation, detailing the causes of the change in terms of the intermolecular contacts and intermolecular interaction energies. This is followed by the confirmation of the generality of the crystal-structure change by methylthiolation of a series of acene and heteroacenes, where the herringbone structure in the parent system is unexceptionally transformed into the pitched π-stacking structure, a promising crystal structure for high-mobility molecular semiconductors well exemplified by the prototypical molecular semiconductor, rubrene. In fact, the methylthiolated anthradithiophene afforded comparable high mobility to rubrene in single-crystal field-effect transistors. Then, we demonstrate that the sandwich herringbone structures of peri-condensed polycyclic aromatic hydrocarbons, including pyrene, perylene, and peropyrene, change into brickwork crystal structures upon methylthiolation and that, among these compounds, very promising molecular semiconductors, methylthiolated pyrene and peropyrene, showing ultrahigh mobility of 30 cm2 V s-1, are realized.Through the studies, by gaining insights into the underlying mechanisms driving the crystal structure changes, we lay a strong foundation for tackling challenges related to controlling the crystal structures and developing high-performance molecular semiconductors. This will be a distinct approach from the past activities in the development of molecular semiconductors that mainly focused on molecules themselves, including their synthesis, properties, and characterization. We thus anticipate that our findings and the present Account will open the door to a new era of the development of molecular semiconductors.

  5. Quinoidal Acenedichalcogenophenediones for Near-Infrared-Absorbing Organic Semiconductors: Effects of Chalcogen Atom Substitution on the Physicochemical and Carrier Transport Properties

    Kohsuke Kawabata, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　35　(18)　7628-7642　2023/09

    DOI： 10.1021/acs.chemmater.3c01350 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  6. Methylthiolation of Acenes: Change of Crystal Structure from Herringbone to Rubrene-like Pitched & pi;-Stacking Structure

    Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya

    CRYSTAL GROWTH & DESIGN　23　(8)　5941-5949　2023/07

    DOI： 10.1021/acs.cgd.3c00525 　

    ISSN： 1528-7483

    eISSN： 1528-7505

  7. Synthesis of 3,3′-dihydroxy-2,2′-diindan-1,1′-dione derivatives for tautomeric organic semiconductors exhibiting intramolecular double proton transfer

    Kyohei Nakano, Iat Wai Leong, Daisuke Hashizume, Kirill Bulgarevich, Kazuo Takimiya, Yusuke Nishiyama, Toshio Yamazaki, Keisuke Tajima

    Chemical Science　14　(43)　12205-12218　2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d3sc04125e 　

    ISSN： 2041-6520

    eISSN： 2041-6539

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    A new synthetic route for 3,3′-dihydroxy-2,2′-diindan-1,1′-dione derivatives allows the study of the intramolecular double proton transfer in the solid state, which could elucidate possible interplay between tautomerization and charge transport.

  8. Uncovered Effects of thieno[2,3-b]thiophene Substructure in a Tetrathienoacene Backbone: Reorganization Energy and Intermolecular Interaction

    Kiseki Kanazawa, Kirill Bulgarevich, Kohsuke Kawabata, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　2022/12

    DOI： 10.1021/acs.chemmater.2c03160 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  9. What Defines a Crystal Structure? Effects of Chalcogen Atoms in 3,7-Bis(methylchalcogeno)benzo[1,2-b:4,5-b ']dichalcogenophene-Based Organic Semiconductors(dagger)

    Kazuo Takimiya, Kirill Bulgarevich, Kamon Sahara, Kiseki Kanazawa, Hiroyuki Takenaka, Kohsuke Kawabata

    CHINESE JOURNAL OF CHEMISTRY　40　(21)　2546-2558　2022/11

    DOI： 10.1002/cjoc.202200302 　

    ISSN： 1001-604X

    eISSN： 1614-7065

  10. Effects of Conformation on Doping Efficiency in pi-Extended Bipyranylidene Molecules: Relationship between Molecular Structure and Electron-Doping Ability for Developing n-Type Organic Thermoelectrics

    Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　95　(7)　1047-1053　2022/07

    DOI： 10.1246/bcsj.20220124 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  11. Bandlike versus Temperature-IndependentCarrier Transport in IsomericDiphenyldinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes

    Kazuo Takimiya, Kirill Bulgarevich, Shingo Horiuchi, Aoi Sato, Kohsuke Kawabata

    ACS MATERIALS LETTERS　4　(4)　675-681　2022/04

    DOI： 10.1021/acsmaterialslett.2c00084 　

    eISSN： 2639-4979

  12. Packing structures of (trialkylsilyl)ethynyl-substituted dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes (DNTTs): effects of substituents on crystal structures and transport properties

    Kazuo Takimiya, Sayaka Usui, Aoi Sato, Kiseki Kanazawa, Kohsuke Kawabata

    JOURNAL OF MATERIALS CHEMISTRY C　10　(7)　2775-2782　2022/02

    DOI： 10.1039/d1tc04312a 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  13. Enantiopure 2-(2-ethylhexyl)dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophenes: synthesis, single-crystal structure and a surprising lack of influence of stereoisomerism on thin-film structure and electronic properties

    Kenta Sumitomo, Yuta Sudo, Kiseki Kanazawa, Kohsuke Kawabata, Kazuo Takimiya

    MATERIALS HORIZONS　9　(1)　444-451　2022/01

    DOI： 10.1039/d1mh01119g 　

    ISSN： 2051-6347

    eISSN： 2051-6355

  14. Quinoid-Aromatic Resonance for Very Small Optical Energy Gaps in Small-Molecule Organic Semiconductors: A Naphthodithiophenedione-oligothiophene Triad System

    Kohsuke Kawabata, Kazuo Takimiya

    CHEMISTRY-A EUROPEAN JOURNAL　27　(63)　15660-15670　2021/11

    DOI： 10.1002/chem.202102663 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  15. Highly Electron-Donating Bipyranylidene Derivatives: Potential n-Type Dopants for Organic Thermoelectrics

    Takaya Matsuo, Kohsuke Kawabata, Kazuo Takimiya

    ADVANCED ENERGY AND SUSTAINABILITY RESEARCH　2　(11)　2021/11

    DOI： 10.1002/aesr.202100084 　

    ISSN： 2699-9412

  16. Field-Induced Electron Spin Resonance of Site-Selective Carrier Accumulation in Field-Effect Transistors Composed of Organic Semiconductor Solid Solutions

    Hiroyuki Matsui, Eiji Takahashi, Seiji Tsuzuki, Kazuo Takimiya, Tatsuo Hasegawa

    PHYSICAL REVIEW APPLIED　16　(3)　2021/09

    DOI： 10.1103/PhysRevApplied.16.034019 　

    ISSN： 2331-7019

  17. "Manipulation" of Crystal Structure by Methylthiolation Enabling Ultrahigh Mobility in a Pyrene-Based Molecular Semiconductor

    Kazuo Takimiya, Kirill Bulgarevich, Mamatimin Abbas, Shingo Horiuchi, Takuya Ogaki, Kohsuke Kawabata, Abduleziz Ablat

    ADVANCED MATERIALS　33　(32)　2021/08

    DOI： 10.1002/adma.202102914 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  18. Dihedral-Angle Dependence of Intermolecular Transfer Integrals in BEDT-BDT-Based Radical-Cation Salts with θ-Type Molecular Arrangements

    Tomofumi Kadoya, Shiori Sugiura, Toshiki Higashino, Keishiro Tahara, Kazuya Kubo, Takahiko Sasaki, Kazuo Takimiya, Jun-ichi Yamada

    Crystals　11　(8)　868-868　2021/07/27

    Publisher: MDPI AG

    DOI： 10.3390/cryst11080868 　

    eISSN： 2073-4352

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    We report the structural and physical properties of a new organic Mott insulator (BEDT-BDT)AsF6 (BEDT-BDT: benzo[1,2-g:4,5-g′]bis(thieno[2,3-b][1,4dithiin). This AsF6 salt has the same structure as the PF6 salt. Although the anions are disordered, the donor molecules form a θ-type arrangement. The temperature dependence of the resistivity exhibits semiconducting behavior. The static magnetic susceptibility follows Curie–Weiss law over a wide temperature range; however, below 25 K, the magnetic susceptibility is in agreement with a one-dimensional chain model with the exchange coupling J = 7.4 K. No structural phase transition was observed down to 93 K. At 270 K, the Fermi surface calculated by the tight-binding approximation is a two-dimensional cylinder; however, it is significantly distorted at 93 K. This is because the dihedral angles between the BEDT-BDT molecules become larger due to lattice shrinkage at low temperatures, which results in a smaller transfer integral (t1) along the stack direction. This slight change in the dihedral angle gives rise to a significant change in the electronic structure of the AsF6 salt. Radical-cation salts using BEDT-BDT, in which the highest occupied molecular orbital does not have a dominant sign throughout the molecule, are sensitive to slight differences in the overlap between the molecules, and their electronic structures are more variable than those of conventional θ-type conductors.

  19. Crystal Structures of β-Methylchalcogenated Tetrathienoacenes: From One-Dimensional π-Stacking to Sandwich Pitched π-Stacking Structure

    Kazuo Takimiya, Kiseki Kanazawa, Kohsuke Kawabata

    Crystal Growth & Design　21　(7)　4055-4063　2021/05/25

    DOI： 10.1021/acs.cgd.1c00347 　

    ISSN： 1528-7483

    eISSN： 1528-7505

  20. Highly-efficient terahertz emission from hydrogen-bonded single molecular crystal 4-nitro-2,5-bis(phenylethynyl)aniline

    Masato Sotome, Takuya Ogaki, Kazuo Takimiya, Naoki Ogawa

    Optics Express　29　(7)　10048-10058　2021/03/29

    Publisher: The Optical Society

    DOI： 10.1364/OE.418312 　

    ISSN： 1094-4087

  21. A Design Principle for Polar Assemblies with C 3 ‐Sym Bowl‐Shaped π‐Conjugated Molecules

    Cheng Zhang, Yuan Guo, Dan He, Jouji Komiya, Go Watanabe, Takuya Ogaki, Chengyuan Wang, Atsuko Nihonyanagi, Hiroyuki Inuzuka, Hao Gong, Yuanping Yi, Kazuo Takimiya, Daisuke Hashizume, Daigo Miyajima

    Angewandte Chemie International Edition　60　(6)　3261-3267　2021/02/08

    Publisher: Wiley

    DOI： 10.1002/anie.202013333 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  22. Controlled steric selectivity in molecular doping towards closest-packed supramolecular conductors

    Shinya Kohno, Yu Yamashita, Naotaka Kasuya, Tsubasa Mikie, Itaru Osaka, Kazuo Takimiya, Jun Takeya, Shun Watanabe

    Communications Materials　1　(1)　2020/11/04

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s43246-020-00081-3 　

    eISSN： 2662-4443

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    Abstract Recent developments in molecular doping technologies allow extremely high carrier densities in polymeric semiconductors, exhibiting great diversity because of the unique size, conformation, and steric effect of molecular dopants. However, it is controversial how steric effects can limit the doping efficiency and to what extent dopants can be accommodated in polymers. Here, we employ two distinct conjugated polymers with different alkyl side-chain densities, where polymers are doped via anion-change, allowing greater variation in the incorporation of molecular dopants having different electrostatic potentials and shapes. We characterize the doping efficiency with regard to steric effects, considering the unique void space in the conjugated polymers. Our study reveals that doping efficiency of polymers with sparse alkyl side-chains is significantly greater than that with dense side-chains. A closest-packed supramolecule is realized with a particular combination of a sparse polymer and a large dopant, giving rise to high conductivity, air stability, and remarkably high work function. This work provides a critical insight into overcoming steric effects in molecular doping.

  23. Naphthodithiophenediimide–Bithiopheneimide Copolymers for High‐Performance n‐Type Organic Thermoelectrics: Significant Impact of Backbone Orientation on Conductivity and Thermoelectric Performance

    Yang Wang, Kazuo Takimiya

    Advanced Materials　32　(30)　2002060-2002060　2020/07/22

    Publisher: Wiley

    DOI： 10.1002/adma.202002060 　

  24. Carbonyl-Terminated Quinoidal Oligothiophenes as p-Type Organic Semiconductors

    Takato Asoh, Kohsuke Kawabata, Kazuo Takimiya

    Materials　13　(13)　3020-3020　2020/07/06

    Publisher: MDPI AG

    DOI： 10.3390/ma13133020 　

    eISSN： 1996-1944

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    A series of quinoidal oligothiophenes terminated with carbonyl groups (nTDs, n = 2–4) are studied as p-type organic semiconductors for the active materials in organic field-effect transistors (OFETs) both by the theoretical and experimental approaches. The theoretical calculations clearly show their high-lying highest occupied molecular orbital (HOMO) energy levels (EHOMOs), small reorganization energies for hole transport (λholes), and large contribution of sulfur atoms to HOMOs, all of which are desirable for p-type organic semiconductors. Thus, we synthesized nTDs from the corresponding aromatic oligothiophene precursors and then evaluated their physicochemical properties and structural properties. These experimental evaluations of nTDs nicely proved the theoretical predictions, and the largest 4TDs in the series (4,4′′′-dihexyl- and 3′,4,4″,4′′′-tetrahexyl-5H,5′′′H-[2,2′:5′,2″:5″,2′′′-quaterthiophene]-5,5′′′-dione) can afford solution-processed OFETs showing unipolar p-type behaviors and hole mobility as high as 0.026 cm2 V−1 s−1.

  25. Spatial extent of wave functions of charge carriers in a thienothiophene-based high-mobility molecular semiconductor

    Shin-Ichi Kuroda, Hisaaki Tanaka, Yukihiro Shimoi, Kazuo Takimiya

    Applied Physics Express　13　(4)　2020/04/01

    Publisher: Institute of Physics Publishing

    DOI： 10.35848/1882-0786/ab7e08 　

    ISSN： 1882-0786 1882-0778

  26. Crystal Structures of Dimethoxyanthracens: A Clue to a Rational Design of Packing Structures of π‐Conjugated Molecules

    Kazuo Takimiya, Takuya Ogaki, Chengyuan Wang, Kohsuke Kawabata

    Chemistry – An Asian Journal　15　(6)　915-919　2020/03/16

    Publisher: Wiley

    DOI： 10.1002/asia.201901756 　

    ISSN： 1861-4728

    eISSN： 1861-471X

  27. Synthesis of Soluble Dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT) Derivatives: One-Step Functionalization of 2-Bromo-DNTT

    Kohsuke Kawabata, Sayaka Usui, Kazuo Takimiya

    The Journal of Organic Chemistry　85　(1)　195-206　2020/01/03

    Publisher: American Chemical Society ({ACS})

    DOI： 10.1021/acs.joc.9b02585 　

    ISSN： 0022-3263

    eISSN： 1520-6904

  28. A Design Principle for Polar Assemblies with C 3 ‐Sym Bowl‐Shaped π‐Conjugated Molecules

    Cheng Zhang, Yuan Guo, Dan He, Jouji Komiya, Go Watanabe, Takuya Ogaki, Chengyuan Wang, Atsuko Nihonyanagi, Hiroyuki Inuzuka, Hao Gong, Yuanping Yi, Kazuo Takimiya, Daisuke Hashizume, Daigo Miyajima

    Angewandte Chemie　133　(6)　3298-3304　2020

    Publisher: Wiley

    DOI： 10.1002/ange.202013333 　

    ISSN： 0044-8249

  29. Two-dimensional radical–cationic Mott insulator based on an electron donor containing neither a tetrathiafulvalene nor tetrathiapentalene skeleton

    Tomofumi Kadoya, Shiori Sugiura, Keishiro Tahara, Toshiki Higashino, Kazuya Kubo, Takahiko Sasaki, Kazuo Takimiya, Jun-ichi Yamada

    CrystEngComm　22　(36)　5949-5953　2020

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/D0CE00878H 　

    eISSN： 1466-8033

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    <p>We have succeeded in developing a two-dimensional radical–cationic Mott insulator that does not contain a 1,3-dithiol-2-ylidene moiety.</p>

  30. “Heavy-atom effects” in the parent [1]benzochalcogenopheno[3,2-b][1]benzochalcogenophene system

    Chengyuan Wang, Mamatimin Abbas, Guillaume Wantz, Kohsuke Kawabata, Kazuo Takimiya

    Journal of Materials Chemistry C　8　(43)　15119-15127　2020

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/D0TC01408G 　

    ISSN： 2050-7526

    eISSN： 2050-7534

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    <p>Effects of the chalcogen atoms in [1]benzochalcogenopheno[3,2-<italic>b</italic>][1]benzochalcogenophenes (BXBXs), the key π-conjugated core structures in the development of superior organic semiconductors, are investigated.</p>

  31. Gate-tunable gas sensing behaviors in air-stable ambipolar organic thin-film transistors

    Hyunah Kwon, Hocheon Yoo, Masahiro Nakano, Kazuo Takimiya, Jae-Joon Kim, Jong Kyu Kim

    RSC Advances　2020

    DOI： 10.1039/C9RA09195E 　

  32. “Disrupt and induce” intermolecular interactions to rationally design organic semiconductor crystals: from herringbone to rubrene-like pitched π-stacking

    Chengyuan Wang, Daisuke Hashizume, Masahiro Nakano, Takuya Ogaki, Hiroyuki Takenaka, Kohsuke Kawabata, Kazuo Takimiya

    Chemical Science　11　(6)　1573-1580　2020

    Publisher: Royal Society of Chemistry ({RSC})

    DOI： 10.1039/C9SC05902D 　

    ISSN： 2041-6520

    eISSN： 2041-6539

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    <p>The rational design of organic semiconductor crystals is realized by β-methylthionation of acenedithiophenes through manipulating intermolecular interactions in a “disrupt and induce” manner.</p>

  33. Naphtho[1,2-b:5,6-b′]dithiophene Building Blocks and their Complexation with Cyclobis(paraquat-p-phenylene)

    Morten Jensen, Gunnar Olsen, Rikke Kristensen, Kazuo Takimiya, Jan O. Jeppesen

    European Journal of Organic Chemistry　2019　(46)　7532-7540　2019/12/15

    Publisher: Wiley-VCH Verlag

    DOI： 10.1002/ejoc.201901161 　

    ISSN： 1099-0690 1434-193X

  34. The effect of alkyl chain branching positions on the electron mobility and photovoltaic performance of naphthodithiophene diimide (NDTI)-based polymers Peer-reviewed

    Yang, Jing, An, Ning, Sun, Su, Sun, Xiangnan, Nakano, Masahiro, Takimiya, Kazuo, Xiao, Bo, Zhou, Erjun

    SCIENCE CHINA-CHEMISTRY　62　(12)　1649-1655　2019/12

    DOI： 10.1007/s11426-019-9645-1 　

    ISSN： 1674-7291

    eISSN： 1869-1870

  35. Chasing the “Killer” Phonon Mode for the Rational Design of Low-Disorder, High-Mobility Molecular Semiconductors

    Guillaume Schweicher, Gabriele D'Avino, Michael T. Ruggiero, David J. Harkin, Katharina Broch, Deepak Venkateshvaran, Guoming Liu, Audrey Richard, Christian Ruzié, Jeff Armstrong, Alan R. Kennedy, Kenneth Shankland, Kazuo Takimiya, Yves H. Geerts, J. Axel Zeitler, Simone Fratini, Henning Sirringhaus

    Advanced Materials　31　(43)　2019/10/01

    Publisher: Wiley-VCH Verlag

    DOI： 10.1002/adma.201902407 　

    ISSN： 1521-4095 0935-9648

  36. Low optical turn-on voltage in solution processed hybrid light emitting transistor

    Ablat, A., Kyndiah, A., Bachelet, A., Takimiya, K., Hirsch, L., Fasquel, S., Abbas, M.

    Applied Physics Letters　115　(2)　2019

    DOI： 10.1063/1.5090220 　

  37. Synthesis of Thiophene-annulated Naphthalene Diimide-based Small-Molecular Acceptors via Two-step C−H Activation

    Matsidik, R., Takimiya, K.

    Chemistry - An Asian Journal　14　(10)　2019

    Publisher: Wiley

    DOI： 10.1002/asia.201801655 　

  38. Selenium-Substituted β-Methylthiobenzo[1,2- b:4,5- b′]dithiophenes: Synthesis, Packing Structure, and Transport Properties Peer-reviewed

    Takenaka, H., Ogaki, T., Wang, C., Kawabata, K., Takimiya, K.

    Chemistry of Materials　31　(17)　6696-6705　2019

    DOI： 10.1021/acs.chemmater.9b01187 　

    ISSN： 0897-4756

  39. High Operation Stability of Ultraflexible Organic Solar Cells with Ultraviolet-Filtering Substrates Peer-reviewed

    Kimura, H., Fukuda, K., Jinno, H., Park, S., Saito, M., Osaka, I., Takimiya, K., Umezu, S., Someya, T.

    Advanced Materials　31　(19)　2019

    DOI： 10.1002/adma.201808033 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  40. Effect of non-chlorinated solvents on the enhancement of field-effect mobility in dioctylbenzothienobenzothiophene-based top-gate organic transistors processed by spin coating

    Sanda, S., Nakamichi, R., Nagase, T., Kobayashi, T., Takimiya, K., Sadamitsu, Y., Naito, H.

    Organic Electronics: physics, materials, applications　69　181-189　2019

    Publisher: Elsevier {BV}

    DOI： 10.1016/j.orgel.2019.02.004 　

    ISSN： 1566-1199

  41. Durable Ultraflexible Organic Photovoltaics with Novel Metal-Oxide-Free Cathode Peer-reviewed

    Jiang, Z., Fukuda, K., Huang, W., Park, S., Nur, R., Nayeem, M.O.G., Yu, K., Inoue, D., Saito, M., Kimura, H., Yokota, T., Umezu, S., Hashizume, D., Osaka, I., Takimiya, K., Someya, T.

    Advanced Functional Materials　29　(6)　2019

    DOI： 10.1002/adfm.201808378 　

    ISSN： 1616-301X

    eISSN： 1616-3028

  42. Two isomeric perylenothiophene diimides: physicochemical properties and applications in organic semiconducting devices Peer-reviewed

    Masahiro Nakano, Kyohei Nakano, Kazuo Takimiya, Keisuke Tajima

    Journal of Materials Chemistry C　7　(8)　2267-2275　2019

    DOI： 10.1039/C8TC05577G 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  43. Tuning the absorption range of naphthothiophene diimide-based acceptors for organic solar cells Peer-reviewed

    Hamonnet, J., Nakano, M., Takahara, A., Takimiya, K.

    Dyes and Pigments　171　107691　2019

    DOI： 10.1016/j.dyepig.2019.107691 　

  44. Air-stable and balanced split-gate organic transistors Peer-reviewed

    Yoo Hocheon, Nakano Masahiro, On Sungmin, Ahn Hyungju, Lee Han-Koo, Takimiya Kazuo, Kim Jae-Joon

    ORGANIC ELECTRONICS　63　200-206　2018/12

    DOI： 10.1016/j.orgel.2018.09.022 　

    ISSN： 1566-1199

  45. Thienoquinoidal System: Promising Molecular Architecture for Optoelectronic Applications Invited Peer-reviewed

    Kazuo Takimiya, Kohsuke Kawabata

    Journal of Synthetic Organic Chemistry, Japan　76　(11)　1176-1184　2018/11

  46. Solution-crystallized n-type organic thin-film transistors: An impact of branched alkyl chain on high electron mobility and thermal durability Peer-reviewed

    Shohei Kumagai, Masahiro Nakano, Kazuo Takimiya, Jun Takeya

    Organic Electronics　62　548-553　2018/11

    DOI： 10.1016/j.orgel.2018.06.029 　

    ISSN： 1566-1199

  47. Extended and Modulated Thienothiophenes for Thermally Durable and Solution-Processable Organic Semiconductors Peer-reviewed

    Inoue Satoru, Shinamura Shoji, Sadamitsu Yuichi, Arai Shunto, Horiuchi Sachio, Yoneya Makoto, Takimiya Kazuo, Hasegawa Tatsuo

    CHEMISTRY OF MATERIALS　30　(15)　5050-5060　2018/08/14

    DOI： 10.1021/acs.chemmater.8b01339 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  48. High-performance didodecylbenzothienobenzothiophene-based top-gate organic transistors processed by spin coating using binary solvent mixtures Peer-reviewed

    Shoya Sanda, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Yuichi Sadamitsu, Hiroyoshi Naito

    Organic Electronics　58　306-312　2018/07

    DOI： 10.1016/j.orgel.2018.04.013 　

    ISSN： 1566-1199

  49. Reverse-Offset Printed Ultrathin Ag Mesh for Robust Conformal Transparent Electrodes for High-Performance Organic Photovoltaics Peer-reviewed

    Zhi Jiang, Kenjiro Fukuda, Xiaomin Xu, Sungjun Park, Daishi Inoue, Hanbit Jin, Masahiko Saito, Itaru Osaka, Kazuo Takimiya, Takao Someya

    Advanced Materials　30　(26)　2018/06/27

    DOI： 10.1002/adma.201707526 　

    ISSN： 1521-4095 0935-9648

  50. Thiophene-fused naphthalene diimides: New building blocks for electron deficient p-functional materials Peer-reviewed

    Kazuo Takimiya, Masahiro Nakano

    Bulletin of the Chemical Society of Japan　91　(1)　121-140　2018

    DOI： 10.1246/bcsj.20170298 　

    ISSN： 1348-0634 0009-2673

  51. Thiacycle-fused benzo[1,2-: B:4,5- b ′]dithiophenes (BDTs): Synthesis, packing, molecular orientation and semiconducting properties Peer-reviewed

    Chengyuan Wang, Hiroshi Nakamura, Hiroyoshi Sugino, Kazuo Takimiya

    Journal of Materials Chemistry C　6　(14)　3604-3612　2018

    DOI： 10.1039/c7tc05317g 　

    ISSN： 2050-7526 2050-7534

  52. 2-V operated flexible vertical organic transistor with good air stability and bias stress reliability Peer-reviewed

    Kuan-Min Huang, Hung-Cheng Lin, Kazuaki Kawashima, Itaru Osaka, Hsiao-Wen Zan, Hsin-Fei Meng, Kazuo Takimiya

    ORGANIC ELECTRONICS　50　325-330　2017/11

    DOI： 10.1016/j.orgel.2017.08.007 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  53. Bis(naphthothiophene diimide)indacenodithiophenes as Acceptors for Organic Photovoltaics Peer-reviewed

    Johan Harnonnet, Masahiro Nakano, Kyohei Nakano, Hiroyoshi Sugino, Kazuo Takimiya, Keisuke Tajima

    CHEMISTRY OF MATERIALS　29　(22)　9618-9622　2017/11

    DOI： 10.1021/acs.chemmater.7b03733 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  54. Stretchable and waterproof elastomer-coated organic photovoltaics for washable electronic textile applications Peer-reviewed

    Hiroaki Jinno, Kenjiro Fukuda, Xiaomin Xu, Sungjun Park, Yasuhito Suzuki, Mari Koizumi, Tomoyuki Yokota, Itaru Osaka, Kazuo Takimiya, Takao Someya

    NATURE ENERGY　2　(10)　2017/10

    DOI： 10.1038/s41560-017-0001-3 　

    ISSN： 2058-7546

  55. Methylthionated benzo[1,2-b:4,5-b '] dithiophenes: a model study to control packing structures and molecular orientation in thienoacene-based organic semiconductors Peer-reviewed

    Chengyuan Wang, Hiroshi Nakamura, Hiroyoshi Sugino, Kazuo Takimiya

    CHEMICAL COMMUNICATIONS　53　(69)　9594-9597　2017/09

    DOI： 10.1039/c7cc04998f 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  56. Ionic manipulation of charge-transfer and photodynamics of [60]fullerene confined in pyrrolo-tetrathiafulvalene cage Peer-reviewed

    Steffen Bahring, Karina R. Larsen, Mustafa Supur, Kent A. Nielsen, Thomas Poulsen, Kei Ohkubo, Craig W. Marlatt, Eigo Miyazaki, Kazuo Takimiya, Amar H. Flood, Shunichi Fukuzumi, Jan O. Jeppesen

    CHEMICAL COMMUNICATIONS　53　(71)　9898-9901　2017/09

    DOI： 10.1039/c7cc03775a 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  57. High-performance solution-processed organic thin-film transistors based on a soluble DNTT derivative Peer-reviewed

    Masanori Sawamoto, Hiroyoshi Sugino, Masahiro Nakano, Kazuo Takimiya

    ORGANIC ELECTRONICS　46　68-76　2017/07

    DOI： 10.1016/j.orgel.2017.04.001 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  58. Naphthobischalcogenadiazole Conjugated Polymers: Emerging Materials for Organic Electronics Peer-reviewed

    Itaru Osaka, Kazuo Takimiya

    ADVANCED MATERIALS　29　(25)　2017/07

    DOI： 10.1002/adma.201605218 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  59. Cumulative gain in organic solar cells by using multiple optical nanopatterns Peer-reviewed

    Soo Won Heo, Thu Hac Huong Le, Takuo Tanaka, Itaru Osaka, Kazuo Takimiya, Keisuke Tajima

    JOURNAL OF MATERIALS CHEMISTRY A　5　(21)　10347-10354　2017/06

    DOI： 10.1039/c7ta01897e 　

    ISSN： 2050-7488

    eISSN： 2050-7496

  60. Tuning the effective spin-orbit coupling in molecular semiconductors Peer-reviewed

    Sam Schott, Erik R. McNellis, Christian B. Nielsen, Hung-Yang Chen, Shun Watanabe, Hisaaki Tanaka, Iain McCulloch, Kazuo Takimiya, Jairo Sinova, Henning Sirringhaus

    NATURE COMMUNICATIONS　8　2017/05

    DOI： 10.1038/ncomms15200 　

    ISSN： 2041-1723

  61. Selective thionation of naphtho[2,3-b] thiophene diimide: tuning of the optoelectronic properties and packing structure Peer-reviewed

    Wangqiao Chen, Masahiro Nakano, Kazuo Takimiya, Qichun Zhang

    ORGANIC CHEMISTRY FRONTIERS　4　(5)　704-710　2017/05

    DOI： 10.1039/c6qo00871b 　

    ISSN： 2052-4129

  62. Dithienyl Acenedithiophenediones as New -Extended Quinoidal Cores: Synthesis and Properties Peer-reviewed

    Kohsuke Kawabata, Itaru Osaka, Masanori Sawamoto, Jose L. Zafra, Paula Mayorga Burrezo, Juan Casado, Kazuo Takimiya

    CHEMISTRY-A EUROPEAN JOURNAL　23　(19)　4579-4589　2017/04

    DOI： 10.1002/chem.201605104 　

    ISSN： 0947-6539

    eISSN： 1521-3765

  63. Comparison among Perylene Diimide (PDI), Naphthalene Diimide (NDI), and Naphthodithiophene Diimide (NDTI) Based n-Type Polymers for All-Polymer Solar Cells Application Peer-reviewed

    Jing Yang, Bo Xiao, Keisuke Tajima, Masahiro Nakano, Kazuo Takimiya, Ailing Tang, Erjun Zhou

    MACROMOLECULES　50　(8)　3179-3185　2017/04

    DOI： 10.1021/acs.macromol.7b00414 　

    ISSN： 0024-9297

    eISSN： 1520-5835

  64. Effects of Selenium Atoms on [1]Benzochalcogenopheno[3,2-b][1]benzochalcogenophene-based Organic Semiconductors Peer-reviewed

    Hiroyoshi Sugino, Kazuo Takimiya

    CHEMISTRY LETTERS　46　(3)　345-347　2017/03

    DOI： 10.1246/cl.161020 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  65. Very Strong Binding for a Neutral Calix[4]pyrrole Receptor Displaying Positive Allosteric Binding Peer-reviewed

    Troels Duedal, Kent A. Nielsen, Gunnar Olsen, Charlotte B. G. Rasmussen, Jacob Kongsted, Eric Levillain, Tony Breton, Eigo Miyazaki, Kazuo Takimiya, Steffen Bahring, Jan O. Jeppesen

    JOURNAL OF ORGANIC CHEMISTRY　82　(4)　2123-2128　2017/02

    DOI： 10.1021/acs.joc.6b02944 　

    ISSN： 0022-3263

  66. Naphthodithiophenediimide-Benzobisthiadiazole-Based Polymers: Versatile n-Type Materials for Field-Effect Transistors and Thermoelectric Devices Peer-reviewed

    Yang Wang, Masahiro Nakano, Tsuyoshi Michinobu, Yasuhiro Kiyota, Takehiko Mori, Kazuo Takimiya

    MACROMOLECULES　50　(3)　857-864　2017/02

    DOI： 10.1021/acs.macromol.6b02313 　

    ISSN： 0024-9297

    eISSN： 1520-5835

  67. Sodium Sulfide-Promoted Thiophene-Annulations: Powerful Tools for Elaborating Organic Semiconducting Materials Peer-reviewed

    Masahiro Nakano, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　29　(1)　256-264　2017/01

    DOI： 10.1021/acs.chemmater.6b03413 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  68. Effects of branching position of alkyl side chains on ordering structure and charge transport property in thienothiophenedione- and quinacridone-based semiconducting polymers Peer-reviewed

    Kohsuke Kawabata, Masahiko Saito, Noriko Takemura, Itaru Osaka, Kazuo Takimiya

    POLYMER JOURNAL　49　(1)　169-176　2017/01

    DOI： 10.1038/pj.2016.103 　

    ISSN： 0032-3896

    eISSN： 1349-0540

  69. Control of Major Carriers in an Ambipolar Polymer Semiconductor by Self-Assembled Monolayers Peer-reviewed

    Masahiro Nakano, Itaru Osaka, Kazuo Takimiya

    ADVANCED MATERIALS　29　(1)　2017/01

    DOI： 10.1002/adma.201602893 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  70. Reversible Dimerization and Polymerization of a Janus Diradical To Produce Labile C-C Bonds and Large Chromic Effects Peer-reviewed

    Jose L. Zafra, Lili Qiu, Naoyuki Yanai, Takamichi Mori, Masahiro Nakano, Miriam Pena Alvarez, Juan T. Lopez Navarrete, Carlos J. Gomez-Garcia, Miklos Kertesz, Kazuo Takimiya, Juan Casado

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　55　(47)　14563-14568　2016/11

    DOI： 10.1002/anie.201605997 　

    ISSN： 1433-7851

    eISSN： 1521-3773

  71. Detailed analysis and contact properties of low-voltage organic thin-film transistors based on dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene (DNTT) and its didecyl and diphenyl derivatives Peer-reviewed

    Ulrike Kraft, Kazuo Takimiya, Myeong Jin Kang, Reinhold Roedel, Florian Letzkus, Joachim N. Burghartz, Edwin Weber, Hagen Klauk

    ORGANIC ELECTRONICS　35　33-40　2016/08

    DOI： 10.1016/j.orgel.2016.04.038 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  72. N,N '-Unsubstituted Naphthodithiophene Diimide: Synthesis and Derivatization via N-Alkylation and -Arylation Peer-reviewed

    Masahiro Nakano, Masanori Sawamoto, Mizue Yuki, Kazuo Takimiya

    ORGANIC LETTERS　18　(15)　3770-3773　2016/08

    DOI： 10.1021/acs.orglett.6b01785 　

    ISSN： 1523-7060

    eISSN： 1523-7052

  73. Implication of Fluorine Atom on Electronic Properties, Ordering Structures, and Photovoltaic Performance in NaphthobisthiadiazoleBased Semiconducting Polymers Peer-reviewed

    Kazuaki Kawashima, Tomohiro Fukuhara, Yousuke Suda, Yasuhito Suzuki, Tomoyuki Koganezawa, Hiroyuki Yoshida, Hideo Ohkita, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　138　(32)　10265-10275　2016/08

    DOI： 10.1021/jacs.6b05418 　

    ISSN： 0002-7863

  74. Dithienylthienothiophenebisimide, a Versatile Electron-Deficient Unit for Semiconducting Polymers Peer-reviewed

    Masahiko Saito, Itaru Osaka, Yosuke Suda, Hiroyuki Yoshida, Kazuo Takimiya

    ADVANCED MATERIALS　28　(32)　6921-+　2016/08

    DOI： 10.1002/adma.201601373 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  75. N,N '-Bis(2-cyclohexylethyl)naphtho[2,3-b:6,7-b ']dithiophene Diimides: Effects of Substituents Peer-reviewed

    Masahiro Nakano, Daisuke Hashizume, Kazuo Takimiya

    MOLECULES　21　(8)　2016/08

    DOI： 10.3390/molecules21080981 　

    ISSN： 1420-3049

  76. Design and elaboration of organic molecules for high field-effect-mobility semiconductors Peer-reviewed

    Kazuo Takimiya, Masahiro Nakano, Hiroyoshi Sugino, Itaru Osaka

    SYNTHETIC METALS　217　68-78　2016/07

    DOI： 10.1016/j.synthmet.2016.02.018 　

    ISSN： 0379-6779

  77. Very Small Bandgap pi-Conjugated Polymers with Extended Thienoquinoids Peer-reviewed

    Kohsuke Kawabata, Masahiko Saito, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　138　(24)　7725-7732　2016/06

    DOI： 10.1021/jacs.6b03688 　

    ISSN： 0002-7863

  78. Analyses of Thiophene-Based Donor-Acceptor Semiconducting Polymers toward Designing Optical and Conductive Properties: A Theoretical Perspective Peer-reviewed

    Tom Matsui, Yutaka Imamura, Itaru Osaka, Kazuo Takimiya, Takahito Nakajima

    JOURNAL OF PHYSICAL CHEMISTRY C　120　(15)　8305-8314　2016/04

    DOI： 10.1021/acs.jpcc.5b05794 　

    ISSN： 1932-7447

  79. Electron-deficient thienoacenes for opto/electronic applications Peer-reviewed

    Takimiya Kazuo, Nakano Masahiro, Osaka Itaru

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　251　2016/03/13

    ISSN： 0065-7727

  80. Naphthodithiophene Diimide-Based Copolymers: Ambipolar Semiconductors in Field-Effect Transistors and Electron Acceptors with Near-Infrared Response in Polymer Blend Solar Cells Peer-reviewed

    Kyohei Nakano, Masahiro Nakano, Bo Xiao, Erjun Zhou, Kaori Suzuki, Itaru Osaka, Kazuo Takimiya, Keisuke Tajima

    MACROMOLECULES　49　(5)　1752-1760　2016/03

    DOI： 10.1021/acs.macromol.5b02658 　

    ISSN： 0024-9297

    eISSN： 1520-5835

  81. Benzothienobenzothiophene-Based Molecular Conductors: High Conductivity, Large Thermoelectric Power Factor, and One-Dimensional Instability Peer-reviewed

    Yasuhiro Kiyota, Tomofumi Kadoya, Kaoru Yamamoto, Kodai Iijima, Toshiki Higashino, Tadashi Kawamoto, Kazuo Takimiya, Takehiko Mori

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　138　(11)　3920-3925　2016/03

    DOI： 10.1021/jacs.6b01213 　

    ISSN： 0002-7863

  82. Soluble Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene Derivatives for Solution-Processed Organic Field-Effect Transistors Peer-reviewed

    Masanori Sawamoto, Myeong Jin Kang, Eigo Miyazaki, Hiroyoshi Sugino, Itaru Osaka, Kazuo Takimiya

    ACS APPLIED MATERIALS & INTERFACES　8　(6)　3810-3824　2016/02

    DOI： 10.1021/acsami.5b10477 　

    ISSN： 1944-8244

    eISSN： 1944-8252

  83. A comprehensive study of charge trapping in organic field-effect devices with promising semiconductors and different contact metals by displacement current measurements Peer-reviewed

    Sibani Bisoyi, Reinhold Roedel, Ute Zschieschang, Myeong Jin Kang, Kazuo Takimiya, Hagen Klauk, Shree Prakash Tiwari

    SEMICONDUCTOR SCIENCE AND TECHNOLOGY　31　(2)　2016/02

    DOI： 10.1088/0268-1242/31/2/025011 　

    ISSN： 0268-1242

    eISSN： 1361-6641

  84. 21pBB-1 w-temperature ESR studies of charge carriers in organic transistors of a high-mobility molecule C_<10>-DNTT

    Kuroda S., Tanaka H., Kinoshita Y., Shimoi Y., Takimiya K.

    Meeting Abstracts of the Physical Society of Japan　71　1902-1902　2016

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_1902 　

    ISSN： 2189-079X

  85. Amide-bridged terphenyl and dithienylbenzene units for semiconducting polymers Peer-reviewed

    Masahiro Akita, Masahiko Saito, Itaru Osaka, Tomoyuki Koganezawa, Kazuo Takimiya

    RSC ADVANCES　6　(20)　16437-16447　2016

    DOI： 10.1039/c5ra28140g 　

    ISSN： 2046-2069

  86. Naphtho[2,3-b]thiophene diimide (NTI): a mono-functionalisable core-extended naphthalene diimide for electron-deficient architectures Peer-reviewed

    Wangqiao Chen, Masahiro Nakano, Ji-Hoon Kim, Kazuo Takimiya, Qichun Zhang

    JOURNAL OF MATERIALS CHEMISTRY C　4　(38)　8879-8883　2016

    DOI： 10.1039/c6tc03476d 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  87. Thienoacenes Peer-reviewed

    Kazuo Takimiya

    Organic Redox Systems: Synthesis, Properties, and Applications　359-382　2015/12/21

    Publisher: Wiley Blackwell

    DOI： 10.1002/9781118858981.ch11 　

  88. High-efficiency polymer solar cells with small photon energy loss Peer-reviewed

    Kazuaki Kawashima, Yasunari Tamai, Hideo Ohkita, Itaru Osaka, Kazuo Takimiya

    NATURE COMMUNICATIONS　6　2015/12

    DOI： 10.1038/ncomms10085 　

    ISSN： 2041-1723

  89. Single-Crystal-Like Organic Thin-Film Transistors Fabricated from Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene (DNTT) Precursor-Polystyrene Blends Peer-reviewed

    Azusa Hamaguchi, Tsuyoto Negishi, Yu Kimura, Yoshinori Ikeda, Kazuo Takimiya, Satria Zulkarnaen Bisri, Yoshihiro Iwasa, Takashi Shiro

    ADVANCED MATERIALS　27　(42)　6606-+　2015/11

    DOI： 10.1002/adma.201502413 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  90. Solution-processed dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene transistor memory based on phosphorus-doped silicon nanoparticles as a nano-floating gate Peer-reviewed

    Yu Kimura, Azusa Hamaguchi, Yoshinori Ikeda, Takashi Nagase, Hiroyoshi Naito, Kazuo Takimiya, Takashi Shiro

    APPLIED PHYSICS EXPRESS　8　(10)　2015/10

    DOI： 10.7567/APEX.8.101601 　

    ISSN： 1882-0778

    eISSN： 1882-0786

  91. Angular-Shaped 4,9-Dialkyl - and -Naphthodithiophene-Based Donor-Acceptor Copolymers: Investigation of Isomeric Structural Effects on Molecular Properties and Performance of Field-Effect Transistors and Photovoltaics Peer-reviewed

    Sheng-Wen Cheng, De-Yang Chiou, Che-En Tsai, Wei-Wei Liang, Yu-Ying Lai, Jhih-Yang Hsu, Chain-Shu Hsu, Itaru Osaka, Kazuo Takimiya, Yen-Ju Cheng

    ADVANCED FUNCTIONAL MATERIALS　25　(38)　6131-6143　2015/10

    DOI： 10.1002/adfm.201502338 　

    ISSN： 1616-301X

    eISSN： 1616-3028

  92. Effect of Chalcogen Atom on the Properties of Naphthobischalcogenadiazole-Based pi-Conjugated Polymers Peer-reviewed

    Kazuaki Kawashima, Itaru Osaka, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　27　(19)　6558-6570　2015/10

    DOI： 10.1021/acs.chemmater.5b03124 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  93. Highly Efficient and Stable Solar Cells Based on Thiazolothiazole and Naphthobisthiadiazole Copolymers Peer-reviewed

    Masahiko Saito, Itaru Osaka, Yasuhito Suzuki, Kazuo Takimiya, Takashi Okabe, Satoru Ikeda, Tsuyoshi Asano

    SCIENTIFIC REPORTS　5　2015/09

    DOI： 10.1038/srep14202 　

    ISSN： 2045-2322

  94. alpha-Modified Naphthodithiophene Diimides-Molecular Design Strategy for Air-Stable n-Channel Organic Semiconductors Peer-reviewed

    Masahiro Nakano, Itaru Osaka, Daisuke Hashizume, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　27　(18)　6418-6425　2015/09

    DOI： 10.1021/acs.chemmater.5b02601 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  95. Thermally, Operationally, and Environmentally Stable Organic Thin-Film Transistors Based on Bis[1]benzothieno[2,3-d:2 ',3 '-d ']naphtho[2,3-b:6,7-b ']dithiophene Derivatives: Effective Synthesis, Electronic Structures, and Structure-Property Relationship Peer-reviewed

    Masahiro Abe, Takamichi Mori, Itaru Osaka, Kunihisa Sugimoto, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　27　(14)　5049-5057　2015/07

    DOI： 10.1021/acs.chemmater.5b01608 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  96. Efficient inverted polymer solar cells employing favourable molecular orientation Peer-reviewed

    Varun Vohra, Kazuaki Kawashima, Takeshi Kakara, Tomoyuki Koganezawa, Itaru Osaka, Kazuo Takimiya, Hideyuki Murata

    NATURE PHOTONICS　9　(6)　403-+　2015/06

    DOI： 10.1038/NPHOTON.2015.84 　

    ISSN： 1749-4885

    eISSN： 1749-4893

  97. Thienothiophene-2,5-Dione-Based Donor-Acceptor Polymers: Improved Synthesis and Influence of the Donor Units on Ambipolar Charge Transport Properties Peer-reviewed

    Kohsuke Kawabata, Itaru Osaka, Masahiro Nakano, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

    ADVANCED ELECTRONIC MATERIALS　1　(6)　2015/06

    DOI： 10.1002/aelm.201500039 　

    ISSN： 2199-160X

  98. Modeling of Drain Current Mismatch in Organic Thin-Film Transistors Peer-reviewed

    Deyu Tu, Kazuo Takimiya, Ute Zschieschang, Hagen Klauk, Robert Forchheimer

    JOURNAL OF DISPLAY TECHNOLOGY　11　(6)　559-563　2015/06

    DOI： 10.1109/JDT.2015.2419692 　

    ISSN： 1551-319X

    eISSN： 1558-9323

  99. High Yield Ultrafast Intramolecular Singlet Exciton Fission in a Quinoidal Bithiophene Peer-reviewed

    Oleg Varnavski, Neranga Abeyasinghe, Juan Arago, Juan J. Serrano-Perez, Enrigue Orti, Juan T. Lopez Navarrete, Kazuo Takimiya, David Casanova, Juan Casado, Theodore Goodson

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS　6　(8)　1375-1384　2015/04

    DOI： 10.1021/acs.jpclett.5b00198 　

    ISSN： 1948-7185

  100. Naphthodithiophenes: Emerging Building Blocks for Organic Electronics Peer-reviewed

    Kazuo Takimiya, Itaru Osaka

    CHEMICAL RECORD　15　(1)　175-188　2015/02

    DOI： 10.1002/tcr.201402051 　

    ISSN： 1527-8999

    eISSN： 1528-0691

  101. Naphthodithiophene Diimide (NDTI)-Based Semiconducting Copolymers: From Ambipolar to Unipolar n-Type Polymers Peer-reviewed

    Masahiro Nakano, Itaru Osaka, Kazuo Takimiya

    MACROMOLECULES　48　(3)　576-584　2015/02

    DOI： 10.1021/ma502306f 　

    ISSN： 0024-9297

    eISSN： 1520-5835

  102. Backbone orientation in semiconducting polymers Peer-reviewed

    Itaru Osaka, Kazuo Takimiya

    POLYMER　59　A1-A15　2015/02

    DOI： 10.1016/j.polymer.2014.12.066 　

    ISSN： 0032-3861

    eISSN： 1873-2291

  103. 16pAF-5 ESR observations of charge carriers in high-mobility organic semiconductors induced by using ionic-gel-gated transistors

    Tanaka H., Konishi K., Nishio S., Kuroda S., Shimoi Y., Takimiya K.

    Meeting Abstracts of the Physical Society of Japan　70　1511-1511　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1511 　

    ISSN： 2189-079X

  104. 21aAS-6 Conductivity and Thermopower of organic conductors (BTBT)_2X (X: PF_6,AsF_6,SbF_6,TaF_6)

    Kiyota Y., Kadoya T., Iijima K., Higashino T., Kawamoto T., Takimiya K., Mori T.

    Meeting Abstracts of the Physical Society of Japan　70　1789-1789　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.1.0_1789 　

    ISSN： 2189-079X

  105. Performance Improvement of Benzothienobenzothiophene-Based Organic Field-Effect Transistors Processed from Halogen-Free Solvents Invited Peer-reviewed

    中道諒介, 木村友, 永瀬隆, 小林隆史, 瀧宮和男, 濱田雅裕, 内藤裕義

    日本画像学会誌　54　(2)　109-114　2015

    DOI： 10.11370/isj.54.109 　

    ISSN： 1344-4425

  106. Dibenzo[a,e]pentalene-embedded dicyanomethylene-substituted thienoquinoidals for n-channel organic semiconductors: synthesis, properties, and device characteristics Peer-reviewed

    Masahiro Nakano, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY C　3　(2)　283-290　2015

    DOI： 10.1039/c4tc02164a 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  107. Flexible Low-Voltage Organic Complementary Circuits: Finding the Optimum Combination of Semiconductors and Monolayer Gate Dielectrics Peer-reviewed

    Ulrike Kraft, Mirsada Sejfic, Myeong Jin Kang, Kazuo Takimiya, Tarek Zaki, Florian Letzkus, Joachim N. Burghartz, Edwin Weber, Hagen Klauk

    ADVANCED MATERIALS　27　(2)　207-214　2015/01

    DOI： 10.1002/adma.201403481 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  108. Soluble Organic Semiconductor Precursor with Specific Phase Separation for High-Performance Printed Organic Transistors Peer-reviewed

    Yu Kimura, Takashi Nagase, Takashi Kobayashi, Azusa Hamaguchi, Yoshinori Ikeda, Takashi Shiro, Kazuo Takimiya, Hiroyoshi Naito

    ADVANCED MATERIALS　27　(4)　727-732　2015/01

    DOI： 10.1002/adma.201404052 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  109. Flat-Lying Semiconductor-Insulator Interfacial Layer in DNTT Thin Films Peer-reviewed

    Min-Cherl Jung, Matthew R. Leyden, Gueorgui O. Nikiforov, Michael V. Lee, Han-Koo Lee, Tae Joo Shin, Kazuo Takimiya, Yabing Qi

    ACS APPLIED MATERIALS & INTERFACES　7　(3)　1833-1840　2015/01

    DOI： 10.1021/am507528e 　

    ISSN： 1944-8244

    eISSN： 1944-8252

  110. Naphthodithiophenediimide (NDTI)-based triads for high-performance air-stable, solution-processed ambipolar organic field-effect transistors Peer-reviewed

    Jian-Yong Hu, Masahiro Nakano, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY C　3　(17)　4244-4249　2015

    DOI： 10.1039/c5tc00486a 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  111. Achieving high efficiency and stability in inverted organic solar cells fabricated by laminated gold leaf as top electrodes Peer-reviewed

    Nur Tahirah Razali, Itaru Osaka, Kazuo Takimiya, Varun Vohra, Hideyuki Murata

    APPLIED PHYSICS EXPRESS　7　(11)　2014/11

    DOI： 10.7567/APEX.7.111602 　

    ISSN： 1882-0778

    eISSN： 1882-0786

  112. Bias-stress stability of low-voltage p-channel and n-channel organic thin-film transistors on flexible plastic substrates Peer-reviewed

    Sibani Bisoyi, Ute Zschieschang, Myeong Jin Kang, Kazuo Takimiya, Hagen Klauk, Shree Prakash Tiwari

    ORGANIC ELECTRONICS　15　(11)　3173-3182　2014/11

    DOI： 10.1016/j.orgel.2014.08.057 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  113. Effect of Oxygen-Containing Functional Side Chains on the Electronic Properties and Photovoltaic Performances in a Thiophene-Thiazolothiazole Copolymer System Peer-reviewed

    Masahiko Saito, Itaru Osaka, Tomoyuki Koganezawa, Kazuo Takimiya

    HETEROATOM CHEMISTRY　25　(6)　556-564　2014/11

    DOI： 10.1002/hc.21196 　

    ISSN： 1042-7163

    eISSN： 1098-1071

  114. Highly Oriented Polymer Semiconductor Films Compressed at the Surface of Ionic Liquids for High-Performance Polymeric Organic Field-Effect Transistors Peer-reviewed

    Junshi Soeda, Hiroyuki Matsui, Toshihiro Okamoto, Itaru Osaka, Kazuo Takimiya, Jun Takeya

    Advanced Materials　26　(37)　6430-6435　2014/10/01

    DOI： 10.1002/adma.201401495 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  115. All-Polymer Solar Cell with High Near-Infrared Response Based on a Naphthodithiophene Diimide (NDTI) Copolymer Peer-reviewed

    Erjun Zhou, Masahiro Nakano, Seiichiro Izawa, Junzi Cong, Itaru Osaka, Kazuo Takimiya, Keisuke Tajima

    ACS MACRO LETTERS　3　(9)　872-875　2014/09

    DOI： 10.1021/mz5004272 　

    ISSN： 2161-1653

  116. Low-temperature carrier dynamics in high-mobility organic transistors of alkylated dinaphtho-thienothiophene as investigated by electron spin resonance Peer-reviewed

    Yutaro Kinoshita, Hisaaki Tanaka, Yukihiro Shimoi, Kazuo Takimiya, Shin-ichi Kuroda

    APPLIED PHYSICS LETTERS　105　(3)　2014/07

    DOI： 10.1063/1.4890962 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  117. Solution-processed single-crystalline organic transistors on patterned ultrathin gate insulators Peer-reviewed

    Junto Tsurumi, Atefeh Yousefi Amin, Toshihiro Okamoto, Chikahiko Mitsui, Kazuo Takimiya, Hiroyuki Matsui, Marcus Halik, Jun Takeya

    Organic Electronics　15　(6)　1184-1188　2014/06

    DOI： 10.1016/j.orgel.2014.02.028 　

    ISSN： 1566-1199

  118. Split-gate organic field-effect transistors for high-speed operation Peer-reviewed

    T. Uemura, T. Matsumoto, K. Miyake, M. Uno, S. Ohnishi, T. Kato, M. Katayama, S. Shinamura, M. Hamada, M. J. Kang, K. Takimiya, C. Mitsui, T. Okamoto, J. Takeya

    Advanced Materials　26　(19)　2983-2988　2014/05/21

    DOI： 10.1002/adma.201304976 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  119. A Surface Potential Based Organic Thin-Film Transistor Model for Circuit Simulation Verified With DNTT High Performance Test Devices Peer-reviewed

    T. K. Maiti, T. Hayashi, L. Chen, H. Mori, M. J. Kang, K. Takimiya, M. Miura-Mattausch, H. J. Mattausch

    IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING　27　(2)　159-168　2014/05

    DOI： 10.1109/TSM.2014.2304736 　

    ISSN： 0894-6507

    eISSN： 1558-2345

  120. Towards Colorless Transparent Organic Transistors: Potential of Benzothieno[3,2-b] benzothiophene-Based Wide-Gap Semiconductors Peer-reviewed

    Hanul Moon, Hyunsu Cho, Mincheol Kim, Kazuo Takimiya, Seunghyup Yoo

    ADVANCED MATERIALS　26　(19)　3105-3110　2014/05

    DOI： 10.1002/adma.201305440 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  121. Organic Semiconductors Based on [1]Benzothieno[3,2-b][1]benzothiophene Substructure Peer-reviewed

    Kazuo Takimiya, Itaru Osaka, Takamichi Mori, Masahiro Nakano

    ACCOUNTS OF CHEMICAL RESEARCH　47　(5)　1493-1502　2014/05

    DOI： 10.1021/ar400282g 　

    ISSN： 0001-4842

    eISSN： 1520-4898

  122. Contrasting Effect of Alkylation on the Ordering Structure in Isomeric Naphthodithiophene-Based Polymers Peer-reviewed

    Itaru Osaka, Yoshinobu Houchin, Masayuki Yamashita, Takeshi Kakara, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

    MACROMOLECULES　47　(10)　3502-3510　2014/05

    DOI： 10.1021/ma402518d 　

    ISSN： 0024-9297

    eISSN： 1520-5835

  123. 5, 10-linked naphthodithiophenes as the building block for semiconducting polymers Peer-reviewed

    Itaru Osaka, Koki Komatsu, Tomoyuki Koganezawa, Kazuo Takimiya

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　15　(2)　2014/04

    DOI： 10.1088/1468-6996/15/2/024201 　

    ISSN： 1468-6996

  124. [1] Benzothieno[3,2-b][1] benzothiophenes- and dinaphtho[2,3-b: 2 ', 3 '-f] thieno[3,2-b] thiophene-based organic semiconductors for stable, high-performance organic thin-film transistor materials Peer-reviewed

    Kazuo Takimiya, Tatsuya Yamamoto, Hideaki Ebata, Takafumi Izawa

    THIN SOLID FILMS　554　13-18　2014/03

    DOI： 10.1016/j.tsf.2013.08.026 　

    ISSN： 0040-6090

  125. Quinoidal Naphtho[1,2-b:5,6-b ']dithiophenes for Solution-Processed n-Channel Organic Field-Effect Transistors Peer-reviewed

    Takamichi Mori, Naoyuki Yanai, Itaru Osaka, Kazuo Takimiya

    ORGANIC LETTERS　16　(5)　1334-1337　2014/03

    DOI： 10.1021/ol5000567 　

    ISSN： 1523-7060

    eISSN： 1523-7052

  126. Highly transparent thin-film transistors using wide-bandgap organic semiconductors and multilayer transparent electrodes Peer-reviewed

    Hanul Moon, Mincheol Kim, Hyunsu Cho, Kazuo Takimiya, Seunghyup Yoo

    Journal of Information Display　15　(2)　59-63　2014

    Publisher: Taylor and Francis

    DOI： 10.1080/15980316.2014.889612 　

    ISSN： 2158-1606 1598-0316

  127. A Study of Temperature Dependence of Field-effect Mobility in Solution-processed Organic Field-effect Transistors Invited Peer-reviewed

    53　(5)　392-397　2014

    DOI： 10.11370/isj.53.392 　

    ISSN： 1344-4425

  128. Novel dibenzo[a, e] pentalene-based conjugated polymers Peer-reviewed

    Masahiro Nakano, Itaru Osaka, Kazuo Takimiya, Tomoyuki Koganezawa

    JOURNAL OF MATERIALS CHEMISTRY C　2　(1)　64-70　2014

    DOI： 10.1039/c3tc31630k 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  129. Dithiophene-Fused Tetracyanonaphthoquinodimethanes (DT-TNAPs): Synthesis and Characterization of pi-Extended Quinoidal Compounds for n-Channel Organic Semiconductor Peer-reviewed

    Naoyuki Yanai, Takamichi Mori, Shoji Shinamura, Itaru Osaka, Kazuo Takimiya

    ORGANIC LETTERS　16　(1)　240-243　2014/01

    DOI： 10.1021/ol403234q 　

    ISSN： 1523-7060

    eISSN： 1523-7052

  130. pi-Building Blocks for Organic Electronics: Revaluation of "Inductive" and "Resonance" Effects of pi-Electron Deficient Units Peer-reviewed

    Kazuo Takimiya, Itaru Osaka, Masahiro Nakano

    CHEMISTRY OF MATERIALS　26　(1)　587-593　2014/01

    DOI： 10.1021/cm4021063 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  131. Crystalline conjugated polymers for organic electronics Peer-reviewed

    Itaru Osaka, Kazuo Takimiya

    TSUKUBA INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE 2013　54　2014

    DOI： 10.1088/1757-899X/54/1/012016 　

    ISSN： 1757-8981

  132. Thiophene-Thiazolothiazole Copolymers: Significant Impact of Side Chain Composition on Backbone Orientation and Solar Cell Performances Peer-reviewed

    Itaru Osaka, Masahiko Saito, Tomoyuki Koganezawa, Kazuo Takimiya

    ADVANCED MATERIALS　26　(2)　331-338　2014/01

    DOI： 10.1002/adma.201303059 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  133. Small band gap polymers incorporating a strong acceptor, thieno[3,2-b]thiophene-2,5-dione, with p-channel and ambipolar charge transport characteristics Peer-reviewed

    Itaru Osaka, Toru Abe, Hiroki Mori, Masahiko Saito, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY C　2　(13)　2307-2312　2014

    DOI： 10.1039/c3tc32386b 　

    ISSN： 2050-7526

    eISSN： 2050-7534

  134. The Elusive Ethenediselone, Se=C=C=Se Peer-reviewed

    Carl Th. Pedersen, Ming Wah Wong, Kazuo Takimiya, Pascal Gerbaux, Robert Flammang

    AUSTRALIAN JOURNAL OF CHEMISTRY　67　(8-9)　1195-1200　2014

    DOI： 10.1071/CH14098 　

    ISSN： 0004-9425

    eISSN： 1445-0038

  135. Transient nature of graphene quantum dot formation via a hydrothermal reaction Peer-reviewed

    Takashi Ogi, Hideharu Iwasaki, Kana Aishima, Ferry Iskandar, Wei-Ning Wang, Kazuo Takimiya, Kikuo Okuyama

    RSC ADVANCES　4　(99)　55709-55715　2014

    DOI： 10.1039/c4ra09159k 　

    ISSN： 2046-2069

    eISSN： 2046-2069

  136. Charge-Carrier Injection, Extraction and Trapping Dynamics in Organic Thin-Film Transistors based on Different Organic Semiconductors Evaluated by Displacement Current Measurements Peer-reviewed

    Sibani Bisoyi, Reinhold Roedel, Ute Zschieschang, Kazuo Takimiya, Hagen Klauk, Shree Prakash Tiwari

    2014 72ND ANNUAL DEVICE RESEARCH CONFERENCE (DRC)　73-+　2014

    ISSN： 1548-3770

  137. Air-Stable, Low-Voltage Organic Transistors: High-Mobility Thienoacene Derivatives for Unipolar and Complementary Ring Oscillators on Flexible Substrates Peer-reviewed

    U. Kraft, M. Sejfic, T. Zaki, F. Letzkus, J. N. Burghartz, K. Takimiya, E. Weber, H. Klauk

    2014 72ND ANNUAL DEVICE RESEARCH CONFERENCE (DRC)　283-+　2014

    ISSN： 1548-3770

  138. Low-Voltage Organic Field-Effect Transistors for Flexible Electronics Peer-reviewed

    Ute Zschieschang, Reinhold Roedel, Ulrike Kraft, Kazuo Takimiya, Tarek Zaki, Florian Letzkus, Joerg Butschke, Harald Richter, Joachim N. Burghartz, Wei Xiong, Boris Murmann, Hagen Klauk

    2014 IEEE BIPOLAR/BICMOS CIRCUITS AND TECHNOLOGY MEETING (BCTM)　100-106　2014

    DOI： 10.1109/BCTM.2014.6981295 　

    ISSN： 1088-9299

  139. Low-Voltage Organic Transistors for Flexible Electronics Peer-reviewed

    Ute Zschieschang, Reinhold Roedel, Ulrike Kraft, Kazuo Takimiya, Tarek Zaki, Florian Letzkus, Joerg Butschke, Harald Richter, Joachim N. Burghartz, Wei Xiong, Boris Murmann, Hagen Klauk

    2014 DESIGN, AUTOMATION AND TEST IN EUROPE CONFERENCE AND EXHIBITION (DATE)　2014

    DOI： 10.7873/DATE2014.318 　

    ISSN： 1530-1591

  140. High-mobility organic thin-film transistors based on a small-molecule semiconductor deposited in vacuum and by solution shearing Peer-reviewed

    Robert Hofmockel, Ute Zschieschang, Ulrike Kraft, Reinhold Roedel, Nis Hauke Hansen, Matthias Stolte, Frank Wuerthner, Kazuo Takimiya, Klaus Kern, Jens Pflaum, Hagen Klauk

    ORGANIC ELECTRONICS　14　(12)　3213-3221　2013/12

    DOI： 10.1016/j.orgel.2013.09.003 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  141. 5,10-Diborylated naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole: A ready-to-use precursor for the synthesis of high-performance semiconducting polymers Peer-reviewed

    Kazuaki Kawashima, Eigo Miyazaki, Masafumi Shimawaki, Yuki Inoue, Hiroki Mori, Noriko Takemura, Itaru Osaka, Kazuo Takimiya

    Polymer Chemistry　4　(20)　5224-5227　2013/10/21

    DOI： 10.1039/c3py00161j 　

    ISSN： 1759-9962 1759-9954

  142. Consecutive Thiophene-Annulation Approach to pi-Extended Thienoacene-Based Organic Semiconductors with [1]Benzothieno[3,2-b][1]benzothiophene (BTBT) Substructure Peer-reviewed

    Takamichi Mori, Takeshi Nishimura, Tatsuya Yamamoto, Iori Doi, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　135　(37)　13900-13913　2013/09

    DOI： 10.1021/ja406257u 　

    ISSN： 0002-7863

  143. Naphthodithiophenediimide (NDTI): Synthesis, Structure, and Applications Peer-reviewed

    Yuta Fukutomi, Masahiro Nakano, Jian-Yong Hu, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　135　(31)　11445-11448　2013/08

    DOI： 10.1021/ja404753r 　

    ISSN： 0002-7863

  144. Temperature-Independent Transport in High-Mobility Dinaphtho-Thieno-Thiophene (DNTT) Single Crystal Transistors Peer-reviewed

    Wei Xie, Kristin Willa, Yanfei Wu, Roger Haeusermann, Kazuo Takimiya, Bertram Batlogg, C. Daniel Frisbie

    ADVANCED MATERIALS　25　(25)　3478-3484　2013/07

    DOI： 10.1002/adma.201300886 　

    ISSN： 0935-9648

  145. Flexible Low-Voltage Organic Transistors with High Thermal Stability at 250 degrees C Peer-reviewed

    Tomoyuki Yokota, Kazunori Kuribara, Takeyoshi Tokuhara, Ute Zschieschang, Hagen Klauk, Kazuo Takimiya, Yuji Sadamitsu, Masahiro Hamada, Tsuyoshi Sekitani, Takao Someya

    ADVANCED MATERIALS　25　(27)　3639-3644　2013/07

    DOI： 10.1002/adma.201300941 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  146. Droplet Manipulation by an External Electric Field for Crystalline Film Growth Peer-reviewed

    Takeshi Komino, Hirokazu Kuwabara, Masaaki Ikeda, Masayuki Yahiro, Kazuo Takimiya, Chihaya Adachi

    LANGMUIR　29　(30)　9592-9597　2013/07

    DOI： 10.1021/la401729k 　

    ISSN： 0743-7463

  147. Megahertz operation of flexible low-voltage organic thin-film transistors Peer-reviewed

    Ute Zschieschang, Robert Hofmockel, Reinhold Roedel, Ulrike Kraft, Myeong Jin Kang, Kazuo Takimiya, Tarek Zaki, Florian Letzkus, Joerg Butschke, Harald Richter, Joachim N. Burghartz, Hagen Klauk

    ORGANIC ELECTRONICS　14　(6)　1516-1520　2013/06

    DOI： 10.1016/j.orgel.2013.03.021 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  148. Naphthodithiophene-Naphthobisthiadiazole Copolymers for Solar Cells: Alkylation Drives the Polymer Backbone Flat and Promotes Efficiency Peer-reviewed

    Itaru Osaka, Takeshi Kakara, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　135　(24)　8834-8837　2013/06

    DOI： 10.1021/ja404064m 　

    ISSN： 0002-7863

  149. Diphenyl derivatives of dinaphtho[2,3- b:2′,3′-f]thieno[3,2- b ]thiophene: Organic semiconductors for thermally stable thin-film transistors Peer-reviewed

    Myeong Jin Kang, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya, Akiko Nakao

    ACS Applied Materials and Interfaces　5　(7)　2331-2336　2013/04/10

    DOI： 10.1021/am3026163 　

    ISSN： 1944-8244 1944-8252

    eISSN： 1944-8252

  150. Ultraviolet photoelectron spectra of 2,7-diphenyl[1]benzothieno[3,2-b][1] benzothiophene and dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene Peer-reviewed

    H. Yagi, T. Miyazaki, Y. Tokumoto, Y. Aoki, M. Zenki, T. Zaima, S. Okita, T. Yamamoto, E. Miyazaki, K. Takimiya, S. Hino

    CHEMICAL PHYSICS LETTERS　563　55-57　2013/03

    DOI： 10.1016/j.cplett.2013.02.011 　

    ISSN： 0009-2614

    eISSN： 1873-4448

  151. Quinacridone-Diketopyrrolopyrrole-Based Polymers for Organic Field-Effect Transistors Peer-reviewed

    Masahiro Akita, Itaru Osaka, Kazuo Takimiya

    MATERIALS　6　(3)　1061-1071　2013/03

    DOI： 10.3390/ma6031061 　

    ISSN： 1996-1944

  152. Anomalous pressure effect in heteroacene organic field-effect transistors Peer-reviewed

    K. Sakai, Y. Okada, S. Kitaoka, J. Tsurumi, Y. Ohishi, A. Fujiwara, K. Takimiya, J. Takeya

    Physical Review Letters　110　(9)　2013/02/28

    DOI： 10.1103/PhysRevLett.110.096603 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  153. Naphthodithiophenes as building units for small molecules to polymers; a case study for in-depth understanding of structure-property relationships in organic semiconductors Peer-reviewed

    Itaru Osaka, Shoji Shinamura, Toru Abe, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY C　1　(7)　1297-1304　2013

    DOI： 10.1039/c2tc00261b 　

    ISSN： 2050-7526

  154. Thienannulation: Efficient synthesis of π-extended thienoacenes applicable to organic semiconductors Peer-reviewed

    Kazuo Takimiya, Masahiro Nakano, Myeong Jin Kang, Eigo Miyazaki, Itaru Osaka

    European Journal of Organic Chemistry　(2)　217-227　2013/01

    DOI： 10.1002/ejoc.201201139 　

    ISSN： 1434-193X 1099-0690

  155. Benchmarking of a surface potential based organic thin-film transistor model against C10-DNTT high performance test devices Peer-reviewed

    T. K. Maiti, T. Hayashi, H. Mori, M. J. Kang, K. Takimiya, M. Miura-Mattausch, H. J. Mattausch

    IEEE International Conference on Microelectronic Test Structures　157-161　2013

    DOI： 10.1109/ICMTS.2013.6528164 　

    ISSN： 1071-9032

  156. Flexible air-stable three-dimensional polymer field-effect transistors with high output current density Peer-reviewed

    K. Nakayama, W. Ou-Yang, M. Uno, I. Osaka, K. Takimiya, J. Takeya

    Organic Electronics　14　(11)　2908-2915　2013

    DOI： 10.1016/j.orgel.2013.08.002 　

    ISSN： 1566-1199

  157. High-power three-dimensional polymer FETs Peer-reviewed

    K. Nakayama, T. Uemura, M. Uno, T. Okamoto, I. Osaka, K. Takimiya, J. Takeya

    Current Applied Physics　12　(SUPPL.3)　S92-S95　2012/12

    DOI： 10.1016/j.cap.2012.04.016 　

    ISSN： 1567-1739

  158. Sheet-Type Flexible Organic Active Matrix Amplifier System Using Pseudo-CMOS Circuits With Floating-Gate Structure Peer-reviewed

    Tomoyuki Yokota, Tsuyoshi Sekitani, Takeyoshi Tokuhara, Naoya Take, Ute Zschieschang, Hagen Klauk, Kazuo Takimiya, Tsung-Ching Huang, Makoto Takamiya, Takayasu Sakurai, Takao Someya

    IEEE TRANSACTIONS ON ELECTRON DEVICES　59　(12)　3434-3441　2012/12

    DOI： 10.1109/TED.2012.2220853 　

    ISSN： 0018-9383

    eISSN： 1557-9646

  159. Controlling the crystal formation in solution-process for organic field-effect transistors with high-performance Peer-reviewed

    Chuan Liu, Yun Li, Yong Xu, Takeo Minari, Songlin Li, Kazuo Takimiya, Kazuhito Tsukagoshi

    ORGANIC ELECTRONICS　13　(12)　2975-2984　2012/12

    DOI： 10.1016/j.orgel.2012.08.024 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  160. High-performance organic transistors with high-k dielectrics: A comparative study on solution-processed single crystals and vacuum-deposited polycrystalline films of 2,9-didecyl-dinaphtho[2,3-b:2′,3′-f] thieno[3,2-b]thiophene Peer-reviewed

    W. Ou-Yang, T. Uemura, K. Miyake, S. Onish, T. Kato, M. Katayama, M. Kang, K. Takimiya, M. Ikeda, H. Kuwabara, M. Hamada, J. Takeya

    Applied Physics Letters　101　(22)　2012/11/26

    DOI： 10.1063/1.4769436 　

    ISSN： 0003-6951

  161. Borylation on Benzo[1,2-b:4,5-b ']- and Naphtho[1,2-b:5,6-b ']dichalcogenophenes: Different Chalcogene Atom Effects on Borylation Reaction Depending on Fused Ring Structure Peer-reviewed

    Masahiro Nakano, Shoji Shinamura, Ryusuke Sugimoto, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    ORGANIC LETTERS　14　(21)　5448-5451　2012/11

    DOI： 10.1021/ol302521d 　

    ISSN： 1523-7060

    eISSN： 1523-7052

  162. Two Isomeric Didecyl-dinaphtho[2,3-b: 2 ',3 '-f] thieno[3,2-b] thiophenes: Impact of Alkylation Positions on Packing Structures and Organic Field Effect Transistor Characteristics Peer-reviewed

    Myeong Jin Kang, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    JAPANESE JOURNAL OF APPLIED PHYSICS　51　(11)　2012/11

    DOI： 10.1143/JJAP.51.11PD04 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  163. Flexible three-dimensional organic field-effect transistors fabricated by an imprinting technique Peer-reviewed

    Rie Nakahara, Mayumi Uno, Takafumi Uemura, Kazuo Takimiya, Jun Takeya

    Advanced Materials　24　(38)　5212-5216　2012/10/02

    DOI： 10.1002/adma.201201234 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  164. Organic photovoltaics based on 5-hexylthiophene-fused porphyrazines Peer-reviewed

    Hiroki Mori, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    ORGANIC ELECTRONICS　13　(10)　1975-1980　2012/10

    DOI： 10.1016/j.orgel.2012.05.023 　

    ISSN： 1566-1199

  165. 有機トランジスタ内の微結晶粒界を評価する Invited

    松井弘之, 熊木大介, 時任静士, 高橋永次, 瀧宮和男, 長谷川達生

    産総研TODAY　129　15　2012/09

  166. High mobility organic thin-film transistors on plastic substrate Peer-reviewed

    Iori Doi, Myeong Jin Kang, Kazuo Takimiya

    CURRENT APPLIED PHYSICS　12　E2-E5　2012/09

    DOI： 10.1016/j.cap.2011.09.011 　

    ISSN： 1567-1739

  167. Isomerically Pure Anthra[2,3-b:6,7-b ']-difuran (anti-ADF), -dithiophene (anti-ADT), and -diselenophene (anti-ADS): Selective Synthesis, Electronic Structures, and Application to Organic Field-Effect Transistors Peer-reviewed

    Masahiro Nakano, Kazuki Niimi, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    JOURNAL OF ORGANIC CHEMISTRY　77　(18)　8099-8111　2012/09

    DOI： 10.1021/jo301438t 　

    ISSN： 0022-3263

  168. Largely pi-Extended Thienoacenes with Internal Thieno[3,2-b]thiophene Substructures: Synthesis, Characterization, and Organic Field-Effect Transistor Applications Peer-reviewed

    Tatsuya Yamamoto, Takeshi Nishimura, Takamichi Mori, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    ORGANIC LETTERS　14　(18)　4914-4917　2012/09

    DOI： 10.1021/ol302243t 　

    ISSN： 1523-7060

  169. Orthogonally Functionalized Naphthodithiophenes: Selective Protection and Borylation Peer-reviewed

    Shoji Shinamura, Ryusuke Sugimoto, Naoyuki Yanai, Noriko Takemura, Tomoya Kashiki, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    ORGANIC LETTERS　14　(18)　4718-4721　2012/09

    DOI： 10.1021/ol301797g 　

    ISSN： 1523-7060

    eISSN： 1523-7052

  170. Forming semiconductor/dielectric double layers by one-step spin-coating for enhancing the performance of organic field-effect transistors Peer-reviewed

    Chuan Liu, Yun Li, Takeo Minari, Kazuo Takimiya, Kazuhito Tsukagoshi

    ORGANIC ELECTRONICS　13　(7)　1146-1151　2012/07

    DOI： 10.1016/j.orgel.2012.03.025 　

    ISSN： 1566-1199

  171. Facile Syntheses of Anthra[2,3-b]chalcogenophenes Peer-reviewed

    Kazuki Niimi, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    SYNTHESIS-STUTTGART　44　(13)　2102-2106　2012/07

    DOI： 10.1055/s-0031-1291141 　

    ISSN： 0039-7881

  172. Solution-processed, Self-organized Organic Single Crystal Arrays with Controlled Crystal Orientation Peer-reviewed

    Akichika Kumatani, Chuan Liu, Yun Li, Peter Darmawan, Kazuo Takimiya, Takeo Minari, Kazuhito Tsukagoshi

    SCIENTIFIC REPORTS　2　2012/05

    DOI： 10.1038/srep00393 　

    ISSN： 2045-2322

  173. Naphthodithiophene-Based Donor-Acceptor Polymers: Versatile Semiconductors for OFETs and OPVs Peer-reviewed

    Itaru Osaka, Toru Abe, Masafumi Shimawaki, Tomoyuki Koganezawa, Kazuo Takimiya

    ACS MACRO LETTERS　1　(4)　437-440　2012/04

    DOI： 10.1021/mz300065t 　

    ISSN： 2161-1653

  174. A Soluble alpha-Dithienotetrathiafulvalene Derivative for Organic Field-effect Transistors Peer-reviewed

    Iori Doi, Kiyotaka Goshome, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY LETTERS　41　(4)　435-437　2012/04

    DOI： 10.1246/cl.2012.435 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  175. Organic transistors with high thermal stability for medical applications Peer-reviewed

    Kazunori Kuribara, He Wang, Naoya Uchiyama, Kenjiro Fukuda, Tomoyuki Yokota, Ute Zschieschang, Cherno Jaye, Daniel Fischer, Hagen Klauk, Tatsuya Yamamoto, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara, Tsuyoshi Sekitani, Yueh-Lin Loo, Takao Someya

    NATURE COMMUNICATIONS　3　2012/03

    DOI： 10.1038/ncomms1721 　

    ISSN： 2041-1723

  176. Synthesis, Characterization, and Spectroscopic Analysis of Antiaromatic Benzofused Metalloporphyrins Peer-reviewed

    Shun Sugawara, Yusuke Hirata, Satoshi Kojima, Yohsuke Yamamoto, Eigo Miyazaki, Kazuo Takimiya, Shiro Matsukawa, Daisuke Hashizume, John Mack, Nagao Kobayashi, Zhen Fu, Karl M. Kadish, Young Mo Sung, Kil Suk Kim, Dongho Kim

    CHEMISTRY-A EUROPEAN JOURNAL　18　(12)　3566-3581　2012/03

    DOI： 10.1002/chem.201101846 　

    ISSN： 0947-6539

  177. Synthesis, Characterization, and Transistor and Solar Cell Applications of a Naphthobisthiadiazole-Based Semiconducting Polymer (vol 134, pg 3498, 2012) Peer-reviewed

    Itaru Osaka, Masafumi Shimawaki, Hiroki Mori, Iori Doi, Eigo Miyazaki, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　134　(11)　5425-5425　2012/03

    DOI： 10.1021/ja3015346 　

    ISSN： 0002-7863

  178. Quinacridone-Based Semiconducting Polymers: Implication of Electronic Structure and Orientational Order for Charge Transport Property Peer-reviewed

    Itaru Osaka, Masahiro Akita, Tomoyuki Koganezawa, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　24　(6)　1235-1243　2012/03

    DOI： 10.1021/cm300514z 　

    ISSN： 0897-4756

  179. Synthesis, Characterization, and Transistor and Solar Cell Applications of a Naphthobisthiadiazole-Based Semiconducting Polymer Peer-reviewed

    Itaru Osaka, Masafumi Shimawaki, Hiroki Mori, Iori Doi, Eigo Miyazaki, Tomoyuki Koganezawa, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　134　(7)　3498-3507　2012/02

    DOI： 10.1021/ja210687r 　

    ISSN： 0002-7863

  180. ESR anisotropy of organic semiconductor molecules: Calculation and experiment Peer-reviewed

    Hiroyuki Matsui, Daisuke Kumaki, Eiji Takahashi, Kazuo Takimiya, Mitsuhiro Ikawa, Shizuo Tokito, Tatsuo Hasegawa

    Materials Research Society Symposium Proceedings　1436　(January)　6-9　2012

    Publisher: Materials Research Society

    DOI： 10.1557/opl.2012.1322 　

    ISSN： 0272-9172

  181. Correlation between interdomain carrier hopping and apparent mobility in polycrystalline organic transistors as investigated by electron spin resonance Peer-reviewed

    Hiroyuki Matsui, Daisuke Kumaki, Eiji Takahashi, Kazuo Takimiya, Shizuo Tokito, Tatsuo Hasegawa

    PHYSICAL REVIEW B　85　(3)　2012/01

    DOI： 10.1103/PhysRevB.85.035308 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  182. Naphtho[2,3-b:6,7-b ']dichalcogenophenes: Syntheses, Characterizations, and Chalcogene Atom Effects on Organic Field-Effect Transistor and Organic Photovoltaic Devices Peer-reviewed

    Masahiro Nakano, Hiroki Mori, Shoji Shinamura, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　24　(1)　190-198　2012/01

    DOI： 10.1021/cm202853b 　

    ISSN： 0897-4756

    eISSN： 1520-5002

  183. Drastic Change of Molecular Orientation in a Thiazolothiazole Copolymer by Molecular-Weight Control and Blending with PC61BM Leads to High Efficiencies in Solar Cells Peer-reviewed

    Itaru Osaka, Masahiko Saito, Hiroki Mori, Tomoyuki Koganezawa, Kazuo Takimiya

    ADVANCED MATERIALS　24　(3)　425-+　2012/01

    DOI： 10.1002/adma.201103065 　

    ISSN： 0935-9648

  184. Contact Resistance and Megahertz Operation of Aggressively Scaled Organic Transistors Peer-reviewed

    Frederik Ante, Daniel Kaelblein, Tarek Zaki, Ute Zschieschang, Kazuo Takimiya, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Joachim N. Burghartz, Klaus Kern, Hagen Klauk

    SMALL　8　(1)　73-79　2012/01

    DOI： 10.1002/smll.201101677 　

    ISSN： 1613-6810

    eISSN： 1613-6829

  185. Flexible low-voltage organic thin-film transistors and circuits based on C-10-DNTT Peer-reviewed

    Ute Zschieschang, Myeong Jin Kang, Kazuo Takimiya, Tsuyoshi Sekitani, Takao Someya, Tobias W. Canzler, Ansgar Werner, Jan Blochwitz-Nimoth, Hagen Klauk

    JOURNAL OF MATERIALS CHEMISTRY　22　(10)　4273-4277　2012

    DOI： 10.1039/c1jm14917b 　

    ISSN： 0959-9428

  186. Direct formation of organic semiconducting single crystals by solvent vapor annealing on a polymer base film Peer-reviewed

    Chuan Liu, Takeo Minari, Yun Li, Akichika Kumatani, Michael V. Lee, Si Hui Athena Pan, Kazuo Takimiya, Kazuhito Tsukagoshi

    JOURNAL OF MATERIALS CHEMISTRY　22　(17)　8462-8469　2012

    DOI： 10.1039/c2jm15747k 　

    ISSN： 0959-9428

    eISSN： 1364-5501

  187. Anion effects on the cyclobis(paraquat-p-phenylene) host Peer-reviewed

    Sissel S. Andersen, Morten Jensen, Anne Sorensen, Eigo Miyazaki, Kazuo Takimiya, Bo W. Laursen, Amar H. Flood, Jan O. Jeppesen

    CHEMICAL COMMUNICATIONS　48　(42)　5157-5159　2012

    DOI： 10.1039/c2cc31225e 　

    ISSN： 1359-7345

  188. Angular-shaped naphthodifurans, naphtho[1,2-b;5,6-b ']- and naphtho[2,1-b;6,5-b ']-difuran: are they isoelectronic with chrysene? Peer-reviewed

    Masahiro Nakano, Shoji Shinamura, Yoshinobu Houchin, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    CHEMICAL COMMUNICATIONS　48　(45)　5671-5673　2012

    DOI： 10.1039/c2cc31546g 　

    ISSN： 1359-7345

  189. [2,2 '] Bi[naphtho[2,3-b]furanyl]: a versatile organic semiconductor with a furan-furan junction Peer-reviewed

    Kazuki Niimi, Hiroki Mori, Eigo Miyazaki, Itaru Osaka, Hayato Kakizoe, Kazuo Takimiya, Chihaya Adachi

    CHEMICAL COMMUNICATIONS　48　(47)　5892-5894　2012

    DOI： 10.1039/c2cc31960h 　

    ISSN： 1359-7345

    eISSN： 1364-548X

  190. OTFT with PNDT3BT-20 dispersed solution by drop casting method Peer-reviewed

    M. Trifunovic, T. Yokota, Y. Kato, T. Tokuhara, I. Hirata, I. Osaka, K. Takimiya, T. Sekitani, T. Someya, R. Ishihara

    2012 19TH INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD): TFT TECHNOLOGIES AND FPD MATERIALS　203-206　2012

  191. Electroconductive π-junction Au nanoparticles Peer-reviewed

    Masayuki Kanehara, Jun Takeya, Takafumi Uemura, Hideyuki Murata, Kazuo Takimiya, Hikaru Sekine, Toshiharu Teranishi

    Bulletin of the Chemical Society of Japan　85　(9)　957-961　2012

    DOI： 10.1246/bcsj.20120103 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  192. Device Performance of Benzothienobenzothiophene-Based Top-Gate Organic Field-Effect Transistors with Embedded Electrodes Peer-reviewed

    Yu Kimura, Fumio Mochizuki, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    IDW/AD '12: PROCEEDINGS OF THE INTERNATIONAL DISPLAY WORKSHOPS, PT 2　19　901-904　2012

    ISSN： 1883-2490

  193. Effect of Hole-Injection Layer on Top-Gate Organic Field-Effect Transistors Based on Soluble Benzothienobenzothiophene Derivatives Peer-reviewed

    Fumio Mochizuki, Yosuke Miyata, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    IDW/AD '12: PROCEEDINGS OF THE INTERNATIONAL DISPLAY WORKSHOPS, PT 2　19　1129-1132　2012

    ISSN： 1883-2490

  194. A 4 V Operation, Flexible Braille Display Using Organic Transistors, Carbon Nanotube Actuators, and Organic Static Random-Access Memory Peer-reviewed

    Kenjiro Fukuda, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, Kazunori Kuribara, Tomoyuki Yokota, Takushi Sugino, Kinji Asaka, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuya Yamamoto, Kazuo Takimiya, Takanori Fukushima, Takuzo Aida, Makoto Takamiya, Takayasu Sakurai, Takao Someya

    ADVANCED FUNCTIONAL MATERIALS　21　(21)　4019-4027　2011/11

    DOI： 10.1002/adfm.201101050 　

    ISSN： 1616-301X

  195. Low-voltage organic transistor with subfemtoliter inkjet source-drain contacts Peer-reviewed

    Tomoyuki Yokota, Tsuyoshi Sekitani, Yu Kato, Kazunori Kuribara, Ute Zschieschang, Hagen Klauk, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Takao Someya

    MRS COMMUNICATIONS　1　(1)　3-6　2011/11

    DOI： 10.1557/mrc.2011.4 　

    ISSN： 2159-6859

    eISSN： 2159-6867

  196. Spatial control of the threshold voltage of low-voltage organic transistors by microcontact printing of alkyl- and fluoroalkyl-phosphonic acids Peer-reviewed

    Ikue Hirata, Ute Zschieschang, Frederik Ante, Tomoyuki Yokota, Kazunori Kuribara, Tatsuya Yamamoto, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara, Hagen Klauk, Tsuyoshi Sekitani, Takao Someya

    MRS COMMUNICATIONS　1　(1)　33-36　2011/11

    DOI： 10.1557/mrc.2011.11 　

    ISSN： 2159-6859

    eISSN： 2159-6867

  197. Thienoacene-Based Organic Semiconductors Peer-reviewed

    Kazuo Takimiya, Shoji Shinamura, Itaru Osaka, Eigo Miyazaki

    ADVANCED MATERIALS　23　(38)　4347-4370　2011/10

    DOI： 10.1002/adma.201102007 　

    ISSN： 0935-9648

  198. Organic Pseudo-CMOS Circuits for Low-Voltage Large-Gain High-Speed Operation Peer-reviewed

    Kenjiro Fukuda, Tsuyoshi Sekitani, Tomoyuki Yokota, Kazunori Kuribara, Tsung-Ching Huang, Takayasu Sakurai, Ute Zschieschang, Hagen Klauk, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuya Yamamoto, Kazuo Takimiya, Kwang-Ting Cheng, Takao Someya

    IEEE ELECTRON DEVICE LETTERS　32　(10)　1448-1450　2011/10

    DOI： 10.1109/LED.2011.2161747 　

    ISSN： 0741-3106

  199. Two-Photon Mediated Three-Photon Fluorescence: Lessons from a Quinoidal Oligothiophene Dimer Peer-reviewed

    Jeffery E. Raymond, Juan Casado, Juan T. Lopez Navarrete, Kazuo Takimiya, Theodore Goodson

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS　2　(17)　2179-2183　2011/09

    DOI： 10.1021/jz200738t 　

    ISSN： 1948-7185

  200. Disordered polyhalide anion effect on the Fermi surface of the incommensurate organic superconductor (MDT-TSF)I0.77Br0.52 Peer-reviewed

    Tadashi Kawamoto, Takehiko Mori, Kengo Enomoto, Takako Konoike, Taichi Terashima, Shinya Uji, Hiroshi Kitagawa, Kazuo Takimiya, Tetsuo Otsubo

    PHYSICAL REVIEW B　84　(9)　2011/09

    DOI： 10.1103/PhysRevB.84.094518 　

    ISSN： 1098-0121

  201. Solution-crystallized organic field-effect transistors with charge-acceptor layers: High-mobility and low-threshold-voltage operation in air Peer-reviewed

    Junshi Soeda, Yuri Hirose, Masakazu Yamagishi, Akiko Nakao, Takafumi Uemura, Kengo Nakayama, Mayumi Uno, Yasuhiro Nakazawa, Kazuo Takimiya, Jun Takeya

    Advanced Materials　23　(29)　3309-3314　2011/08/02

    DOI： 10.1002/adma.201101027 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  202. Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene (DNTT) thin-film transistors with improved performance and stability Peer-reviewed

    Ute Zschieschang, Frederik Ante, Daniel Kaelblein, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Jan Blochwitz-Nimoth, Hagen Klauk

    ORGANIC ELECTRONICS　12　(8)　1370-1375　2011/08

    DOI： 10.1016/j.orgel.2011.04.018 　

    ISSN： 1566-1199

    eISSN： 1878-5530

  203. Observation of field-induced charge carriers in high-mobility organic transistors of a thienothiophene-based small molecule: Electron spin resonance measurements Peer-reviewed

    Hisaaki Tanaka, Masato Kozuka, Shun-ichiro Watanabe, Hiroshi Ito, Yukihiro Shimoi, Kazuo Takimiya, Shin-ichi Kuroda

    PHYSICAL REVIEW B　84　(8)　2011/08

    DOI： 10.1103/PhysRevB.84.081306 　

    ISSN： 1098-0121

  204. Impact of isomeric structures on transistor performances in naphthodithiophene semiconducting polymers Peer-reviewed

    Itaru Osaka, Toru Abe, Shoji Shinamura, Kazuo Takimiya

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　242　2011/08

    DOI： 10.1021/ja201591a 　

    ISSN： 0065-7727

  205. High-speed flexible organic field-effect transistors with a 3D structure Peer-reviewed

    Mayumi Uno, Kengo Nakayama, Junshi Soeda, Yuri Hirose, Kazumoto Miwa, Takafumi Uemura, Akiko Nakao, Kazuo Takimiya, Jun Takeya

    Advanced Materials　23　(27)　3047-3051　2011/07/19

    DOI： 10.1002/adma.201101179 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  206. General Synthesis of Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene (DNTT) Derivatives Peer-reviewed

    Kazuki Niimi, Myeong Jin Kang, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    ORGANIC LETTERS　13　(13)　3430-3433　2011/07

    DOI： 10.1021/ol2010837 　

    ISSN： 1523-7060

  207. Dianthra[2,3-b:2 &apos; 3 &apos;-f]thieno[3,2-b]thiophene (DATT): Synthesis, Characterization, and FET Characteristics of New pi-Extended Heteroarene with Eight Fused Aromatic Rings Peer-reviewed

    Kazuki Niimi, Shoji Shinamura, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　133　(22)　8732-8739　2011/06

    DOI： 10.1021/ja202377m 　

    ISSN： 0002-7863

  208. AIR-STABLE AND HIGH-MOBILITY ORGANIC SEMICONDUCTORS BASED ON HETEROARENES FOR FIELD-EFFECT TRANSISTORS Peer-reviewed

    Shoji Shinamura, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    HETEROCYCLES　83　(6)　1187-1204　2011/06

    DOI： 10.3987/REV-10-690 　

    ISSN： 0385-5414

  209. Efficient Photocurrent Generation at Dinaphtho[2,3-b:2 ',3 '-f]thieno[3,2-b]thiophene/C-60 Bilayer Interface Peer-reviewed

    Hiroki Mori, Kazuo Takimiya

    APPLIED PHYSICS EXPRESS　4　(6)　2011/06

    DOI： 10.1143/APEX.4.061602 　

    ISSN： 1882-0778

  210. Impact of Isomeric Structures on Transistor Performances in Naphthodithiophene Semiconducting Polymers Peer-reviewed

    Itaru Osaka, Toru Abe, Shoji Shinamura, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　133　(17)　6852-6860　2011/05

    DOI： 10.1021/ja201591a 　

    ISSN： 0002-7863

  211. Contact Doping and Ultrathin Gate Dielectrics for Nanoscale Organic Thin-Film Transistors Peer-reviewed

    Frederik Ante, Daniel Kaelblein, Ute Zschieschang, Tobias W. Canzler, Ansgar Werner, Kazuo Takimiya, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Hagen Klauk

    SMALL　7　(9)　1186-1191　2011/05

    DOI： 10.1002/smll.201002254 　

    ISSN： 1613-6810

    eISSN： 1613-6829

  212. Synthesis and Characterization of Benzo[1,2-b:3,4-b ':5,6-b '']trithiophene (BTT) Oligomers Peer-reviewed

    Tomoya Kashiki, Masahiro Kohara, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    JOURNAL OF ORGANIC CHEMISTRY　76　(10)　4061-4070　2011/05

    DOI： 10.1021/jo2005044 　

    ISSN： 0022-3263

  213. Simple Oligothiophene-Based Dyes for Dye-Sensitized Solar Cells (DSSCs): Anchoring Group Effects on Molecular Properties and Solar Cell Performance Peer-reviewed

    Eigo Miyazaki, Takashi Okanishi, Yuki Suzuki, Nozomi Ishine, Hiroki Mori, Kazuo Takimiya, Yutaka Harima

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　84　(5)　459-465　2011/05

    DOI： 10.1246/bcsj.20100302 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  214. Linear- and angular-shaped naphthodithiophenes: Selective synthesis, properties, and application to organic field-effect transistors Peer-reviewed

    Shoji Shinamura, Itaru Osaka, Eigo Miyazaki, Akiko Nakao, Masakazu Yamagishi, Jun Takeya, Kazuo Takimiya

    Journal of the American Chemical Society　133　(13)　5024-5035　2011/04

    DOI： 10.1021/ja110973m 　

    ISSN： 0002-7863

    eISSN： 1520-5126

  215. Patternable solution-crystallized organic transistors with high charge carrier mobility Peer-reviewed

    Kengo Nakayama, Yuri Hirose, Junshi Soeda, Masahiro Yoshizumi, Takafumi Uemura, Mayumi Uno, Wanyan Li, Myeong Jin Kang, Masakazu Yamagishi, Yugo Okada, Eigo Miyazaki, Yasuhiro Nakazawa, Akiko Nakao, Kazuo Takimiya, Jun Takeya

    Advanced Materials　23　(14)　1626-1629　2011/04

    DOI： 10.1002/adma.201004387 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  216. Alkylated Dinaphtho[2,3-b:2 &apos;,3 &apos;-f]Thieno[3,2-b] Thiophenes (C-n-DNTTs): Organic Semiconductors for High-Performance Thin-Film Transistors Peer-reviewed

    Myeong Jin Kang, Iori Doi, Hiroki Mori, Eigo Miyazaki, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara

    ADVANCED MATERIALS　23　(10)　1222-+　2011/03

    DOI： 10.1002/adma.201001283 　

    ISSN： 0935-9648

  217. SYNTHESIS AND PROPERTIES OF N-1-(3-METHOXYPROPYL)-N-3-METHYLIMIDAZOLIUM SALTS Peer-reviewed

    Eigo Miyazaki, Nozomi Ishine, Kazuo Takimiya, Hiroyuki Kai

    HETEROCYCLES　82　(2)　1317-+　2011/03

    DOI： 10.3987/COM-10-S(E)78 　

    ISSN： 0385-5414

  218. Organic Electronics on Banknotes Peer-reviewed

    Ute Zschieschang, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Hagen Klauk

    ADVANCED MATERIALS　23　(5)　654-+　2011/02

    DOI： 10.1002/adma.201003374 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  219. Quinoidal Oligothiophenes with (Acyl)cyanomethylene Termini: Synthesis, Characterization, Properties, and Solution Processed n-Channel Organic Field-Effect Transistors Peer-reviewed

    Yuki Suzuki, Masafumi Shimawaki, Eigo Miyazaki, Itaru Osaka, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　23　(3)　795-804　2011/02

    DOI： 10.1021/cm102109p 　

    ISSN： 0897-4756

  220. High-mobility organic thin-film transistors with photolithographically patterned top contacts Peer-reviewed

    Ute Zschieschang, Nis Hauke Hansen, Jens Pflaum, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Hagen Klauk

    Device Research Conference - Conference Digest, DRC　57-58　2011

    DOI： 10.1109/DRC.2011.5994449 　

    ISSN： 1548-3770

  221. One-step synthesis of [1]benzothieno[3,2-b][1]benzothiophene from o-chlorobenzaldehyde Peer-reviewed

    Masahiko Saito, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda

    TETRAHEDRON LETTERS　52　(2)　285-288　2011/01

    DOI： 10.1016/j.tetlet.2010.11.021 　

    ISSN： 0040-4039

  222. Donor-Acceptor Semiconducting Polymers Based on Thiazole-Containing Fused-Rings for Organic Field-Effect Transistors Peer-reviewed

    Itaru Osaka, Kazuo Takimiya, Richard D. Mccullugh

    KOBUNSHI RONBUNSHU　68　(1)　1-10　2011

    DOI： 10.1295/koron.68.1 　

    ISSN： 0386-2186

  223. Three-dimensional organic field-effect transistors using solution-processed thin films of benzothieno-benzothiophene derivatives Peer-reviewed

    Wanyan Li, Mayumi Uno, Yuri Hirose, Takafumi Uemura, Kazuo Takimiya, Jun Takeya

    Molecular Crystals and Liquid Crystals　539　58/[398]-62/[402]　2011

    DOI： 10.1080/15421406.2011.566055 　

    ISSN： 1542-1406

    eISSN： 1563-5287

  224. Synthesis and characterizations of linear- and angular-shaped naphthodithiophenes for organic semiconductors Peer-reviewed

    K. Takimiya, I. Osaka, S. Shinamura, E. Miyazaki

    ORGANIC FIELD-EFFECT TRANSISTORS X　8117　2011

    DOI： 10.1117/12.893169 　

    ISSN： 0277-786X

  225. Solution-Processable Organic Single Crystals with Bandlike Transport in Field-Effect Transistors Peer-reviewed

    Chuan Liu, Takeo Minari, Xubing Lu, Akichika Kumatani, Kazuo Takimiya, Kazuhito Tsukagoshi

    ADVANCED MATERIALS　23　(4)　523-+　2011/01

    DOI： 10.1002/adma.201002682 　

    ISSN： 0935-9648

    eISSN： 1521-4095

  226. High Hole Mobility Exceeding 4 cm(2)/Vs in Top-Gate C-8-BTBT Field-Effect Transistors Processed by Spin Coating Peer-reviewed

    Fumio Mochizuki, Toshiyuki Endo, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    IDW'11: PROCEEDINGS OF THE 18TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3　85-88　2011

    ISSN： 1883-2490

  227. New Organic Semiconducting Materials for Flexible TFTs Peer-reviewed

    Kazuo Takimiya, Eigo Miyazaki, Itaru Osaka, Shoji Shinamura, Myong Jin Kang

    IDW'11: PROCEEDINGS OF THE 18TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3　1263-1266　2011

    ISSN： 1883-2490

  228. Organic active-matrix TFTs with air-stable organic semiconductors Peer-reviewed

    Takafumi Uemura, Mayumi Uno, Kengo Nakayama, Norikazu Shomoto, Masataka Itoh, Kazuo Takimiya, Jun Takeya

    Proceedings of the International Display Workshops　3　1639-1642　2011

    ISSN： 1883-2490

  229. Benzobisthiazole-Based Semiconducting Copolymers Showing Excellent Environmental Stability in High-Humidity Air Peer-reviewed

    Itaru Osaka, Kazuo Takimiya, Richard D. McCullough

    ADVANCED MATERIALS　22　(44)　4993-+　2010/11

    DOI： 10.1002/adma.201002117 　

    ISSN： 0935-9648

  230. Facile synthesis of [1]benzothieno[3,2-b]benzothiophene from o-dihalostilbenes Peer-reviewed

    Masahiko Saito, Tatsuya Yamamoto, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda

    TETRAHEDRON LETTERS　51　(40)　5277-5280　2010/10

    DOI： 10.1016/j.tetlet.2010.07.152 　

    ISSN： 0040-4039

  231. Dinaphthopentalenes: Pentalene Derivatives for Organic Thin-Film Transistors Peer-reviewed

    Takeshi Kawase, Takeru Fujiwara, Chitoshi Kitamura, Akihito Konishi, Yasukazu Hirao, Kouzou Matsumoto, Hiroyuki Kurata, Takashi Kubo, Shoji Shinamura, Hiroki Mori, Eigo Miyazaki, Kazuo Takimiya

    Angewandte Chemie　122　(42)　7894-7898　2010/09

    Publisher: Wiley-Blackwell

    DOI： 10.1002/ange.201003609 　

    ISSN： 0044-8249

  232. ((Alkyloxy)carbonyl)cyanomethylene-Substituted Thienoquinoidal Compounds: a New Class of Soluble n-Channel Organic Semiconductors for Air-Stable Organic Field-Effect Transistors Peer-reviewed

    Yuki Suzuki, Eigo Miyazaki, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　132　(30)　10453-10466　2010/08

    DOI： 10.1021/ja103171y 　

    ISSN： 0002-7863

  233. Thieno[3,4-c]pyrrole-incorporated quinoidal terthiophene with dicyanomethylene termini: synthesis, characterization, and redox properties Peer-reviewed

    Kyoko Takeda, Masafumi Shimawaki, Akiko Nakao, Itaru Osaka, Eigo Miyazaki, Kazuo Takimiya

    TETRAHEDRON LETTERS　51　(33)　4375-4377　2010/08

    DOI： 10.1016/j.tetlet.2010.06.052 　

    ISSN： 0040-4039

  234. High-power and high-speed organic three-dimensional transistors with submicrometer channels Peer-reviewed

    M. Uno, Y. Hirose, T. Uemura, K. Takimiya, Y. Nakazawa, J. Takeya

    Applied Physics Letters　97　(1)　2010/07/05

    DOI： 10.1063/1.3458867 　

    ISSN： 0003-6951

  235. High-Mobility Semiconducting Naphthodithiophene Copolymers Peer-reviewed

    Itaru Osaka, Toru Abe, Shoji Shinamura, Eigo Miyazaki, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　132　(14)　5000-+　2010/04

    DOI： 10.1021/ja101125p 　

    ISSN： 0002-7863

  236. Free-electron-like Hall effect in high-mobility organic thin-film transistors Peer-reviewed

    M. Yamagishi, J. Soeda, T. Uemura, Y. Okada, Y. Takatsuki, T. Nishikawa, Y. Nakazawa, I. Doi, K. Takimiya, J. Takeya

    Physical Review B - Condensed Matter and Materials Physics　81　(16)　2010/04

    DOI： 10.1103/PhysRevB.81.161306 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  237. Flexible Low-Voltage Organic Transistors and Circuits Based on a High-Mobility Organic Semiconductor with Good Air Stability Peer-reviewed

    Ute Zschieschang, Frederik Ante, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Klaus Kern, Hagen Klauk

    ADVANCED MATERIALS　22　(9)　982-+　2010/03

    DOI： 10.1002/adma.200902740 　

    ISSN： 0935-9648

  238. Synthesis, Properties, Crystal Structures, and Semiconductor Characteristics of Naphtho[1,2-b:5,6-b &apos;]dithiophene and -diselenophene Derivatives Peer-reviewed

    Shoji Shinamura, Eigo Miyazaki, Kazuo Takimiya

    JOURNAL OF ORGANIC CHEMISTRY　75　(4)　1228-1234　2010/02

    DOI： 10.1021/jo902545a 　

    ISSN： 0022-3263

  239. Three Structural Isomers of Dinaphthothieno[3,2-b]thiophenes: Elucidation of Physicochemical Properties, Crystal Structures, and Field-Effect Transistor Characteristics Peer-reviewed

    Tatsuya Yamamoto, Shoji Shinamura, Eigo Miyazaki, Kazuo Takimiya

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　83　(2)　120-130　2010/02

    DOI： 10.1246/bcsj.20090230 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  240. Low-voltage organic transistors with improved stability

    Ute Zschieschang, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Hagen Klauk

    Proceedings of International Meeting on Information Display　86-87　2010

    ISSN： 1738-7558

  241. Low-voltage, high-mobility organic thin-film transistors with improved stability Peer-reviewed

    Ute Zschieschang, Tatsuya Yamamoto, Kazuo Takimiya, Hirokazu Kuwabara, Masaaki Ikeda, Tsuyoshi Sekitani, Takao Someya, Hagen Klauk

    Device Research Conference - Conference Digest, DRC　177-178　2010

    DOI： 10.1109/DRC.2010.5551899 　

    ISSN： 1548-3770

  242. Structure analysis of solution-crystallized 2,7-dioctylbenzothieno[3,2-b] benzothiophene thin films in very high-mobility transistors Peer-reviewed

    J. Soeda, M. Yamagishi, Y. Hirose, T. Uemura, A. Nakao, Y. Nakazawa, S. Shinamura, K. Takimiya, J. Takeya

    Materials Research Society Symposium Proceedings　1270　207-213　2010

    ISSN： 0272-9172

  243. Quinoidal Oligothiophenes: Towards Biradical Ground-State Species Peer-reviewed

    Rocio Ponce Ortiz, Juan Casado, Sandra Rodriguez Gonzalez, Victor Hernandez, Juan T. Lopez Navarrete, Pedro M. Viruela, Enrique Orti, Kazuo Takimiya, Tetsuo Otsubo

    CHEMISTRY-A EUROPEAN JOURNAL　16　(2)　470-484　2010

    DOI： 10.1002/chem.200902037 　

    ISSN： 0947-6539

  244. Unique three-dimensional (3D) molecular array in dimethyl-DNTT crystals: a new approach to 3D organic semiconductors Peer-reviewed

    Myeong Jin Kang, Tatsuya Yamamoto, Shoji Shinamura, Eigo Miyazaki, Kazuo Takimiya

    CHEMICAL SCIENCE　1　(2)　179-183　2010

    DOI： 10.1039/c0sc00156b 　

    ISSN： 2041-6520

  245. Dinaphthopentalenes: Pentalene Derivatives for Organic Thin-Film Transistors Peer-reviewed

    Takeshi Kawase, Takeru Fujiwara, Chitoshi Kitamura, Akihito Konishi, Yasukazu Hirao, Kouzou Matsumoto, Hiroyuki Kurata, Takashi Kubo, Shoji Shinamura, Hiroki Mori, Eigo Miyazaki, Kazuo Takimiya

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　49　(42)　7728-7732　2010

    DOI： 10.1002/anie.201003609 　

    ISSN： 1433-7851

  246. High-power organic field-effect transistors using a three-dimensional structure Peer-reviewed

    M. Uno, Y. Hirose, K. Nakayama, T. Uemura, Y. Nakazawa, K. Takimiya, J. Takeya

    Materials Research Society Symposium Proceedings　1270　161-166　2010

    DOI： 10.1557/PROC-1270-II08-07 　

    ISSN： 0272-9172

  247. Solution-Processed Dioctylbenzothienobenzothiophene-Based Top-Gate Organic Transistors with High Mobility, Low Threshold Voltage, and High Electrical Stability Peer-reviewed

    Toshiyuki Endo, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    APPLIED PHYSICS EXPRESS　3　(12)　2010

    DOI： 10.1143/APEX.3.121601 　

    ISSN： 1882-0778

  248. Organic three-dimensional field-effect transistors Peer-reviewed

    M. Uno, I. Doi, K. Takimiya, J. Takeya

    Materials Research Society Symposium Proceedings　1115　3-8　2010

    ISSN： 0272-9172

  249. Hall effect of solution-crystallized and vapor-deposited 2,7-dioctylbenzothieno[3,2-b]benzothiophene field-effect transistors Peer-reviewed

    M. Yamagishi, T. Uemura, Y. Takatsuki, J. Soeda, Y. Okada, Y. Hirose, Y. Nakazawa, S. Shinamura, K. Takimiya, J. Takeya

    Materials Research Society Symposium Proceedings　1270　119-125　2010

    DOI： 10.1557/PROC-1270-II06-20 　

    ISSN： 0272-9172

  250. Solution-Processed Organic Field Effect Transistors from a Novel Soluble Dinaphthothienothiophene Precursor Peer-reviewed

    Yoshinori Ikeda, Tsuyoto Negishi, Satoru Ohmori, Takashi Shiro, Kazuo Takimiya

    IDW'10: PROCEEDINGS OF THE 17TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3　1701-1704　2010

    ISSN： 1883-2490

  251. A low-temperature and highly reproducible fabrication process for high-mobility solution-processed small molecule field-effect transistors Peer-reviewed

    T. Endo, T. Nagase, T. Kobayashi, K. Takimiya, M. Ikeda, H. Naito

    IDW'10: PROCEEDINGS OF THE 17TH INTERNATIONAL DISPLAY WORKSHOPS, VOLS 1-3　2235-2238　2010

    ISSN： 1883-2490

  252. Development of Air-stable Organic Semiconductors for p-Channel Thin-film Transistors Peer-reviewed

    Kazuo Takimiya

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN　67　(12)　1224-1230　2009/12

    DOI： 10.5059/yukigoseikyokaishi.67.1224 　

    ISSN： 0037-9980

  253. Very high mobility in solution-processed organic thin-film transistors of highly ordered [1]benzothieno[32-b]benzothiophene derivatives Peer-reviewed

    Takafumi Uemura, Yuri Hirose, Mayumi Uno, Kazuo Takimiya, Jun Takeya

    Applied Physics Express　2　(11)　2009/11

    DOI： 10.1143/APEX.2.111501 　

    ISSN： 1882-0778

    eISSN： 1882-0786

  254. Organic Superconductivity Enhanced by Asymmetric-Anion Random Potential in (MDT-TS)I0.85Br0.41 [MDT-TS=5H-2-(1,3-diselenole-2-ylidene)-1,3,4,6-tetrathiapentalene] Peer-reviewed

    Yoshimasa Bando, Tadashi Kawamoto, Takehiko Mori, Toru Kakiuchi, Hiroshi Sawa, Kazuo Takimiya, Tetsuo Otsubo

    CHEMISTRY OF MATERIALS　21　(15)　3521-3525　2009/08

    DOI： 10.1021/cm901456j 　

    ISSN： 0897-4756

  255. Selenophenes as Hetero-Analogues of Thiophene-Based Materials Peer-reviewed

    Tetsuo Otsubo, Kazuo Takimiya

    Handbook of Thiophene-Based Materials: Applications in Organic Electronics and Photonics　321-340　2009/07/21

    Publisher: John Wiley and Sons

    DOI： 10.1002/9780470745533.ch6 　

  256. High-performance dinaphtho-thieno-thiophene single crystal field-effect transistors Peer-reviewed

    Simon Haas, Yukihiro Takahashi, Kazuo Takimiya, Tatsuo Hasegawa

    APPLIED PHYSICS LETTERS　95　(2)　2009/07

    DOI： 10.1063/1.3183509 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  257. One-pot Synthesis of Benzo[b]thiophenes and Benzo[b]selenophenes from o-Halo-Substituted Ethynylbenzenes: Convenient Approach to Mono-, Bis-, and Tris-Chalcogenophene-Annulated Benzenes Peer-reviewed

    Tomoya Kashiki, Shoji Shinamura, Masahiro Kohara, Eigo Miyazaki, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara

    ORGANIC LETTERS　11　(11)　2473-2475　2009/06

    DOI： 10.1021/ol900809w 　

    ISSN： 1523-7060

  258. Alkylated 2,6-Bis(dicyanomethylene)-2,6-dihydrobenzo[1,2-b:4,5-b ']dithiophenes: New Soluble n-Channel Organic Semiconductors for Air-stable OFETs Peer-reviewed

    Tomoya Kashiki, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY LETTERS　38　(6)　568-569　2009/06

    DOI： 10.1246/cl.2009.568 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  259. Molecular Modification of 2,7-Diphenyl[1]benzothieno[3,2-b]benzothiophene (DPh-BTBT) with Diarylamino Substituents: From Crystalline Order to Amorphous State in Evaporated Thin Films Peer-reviewed

    Takafumi Izawa, Hiroki Mori, Yusuke Shinmura, Masahito Iwatani, Eigo Miyazaki, Kazuo Takimiya, Hsio-Wen Hung, Masayuki Yahiro, Chihaya Adachi

    CHEMISTRY LETTERS　38　(5)　420-421　2009/05

    DOI： 10.1246/cl.2009.420 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  260. Unique Molecular Arrangement in Semiconducting Layer and FET Characteristics of Thin Film Transistors Based on 2,6-Dialkylbenzo[1,2-b:4,5-b ']diselenophenes (C-n-BDSs) Peer-reviewed

    Shoji Shinamura, Tomoya Kashiki, Takafumi Izawa, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY LETTERS　38　(4)　352-353　2009/04

    DOI： 10.1246/cl.2009.352 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  261. Organic superconductors with an incommensurate anion structure Peer-reviewed

    Tadashi Kawamoto, Kazuo Takimiya

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　10　(2)　2009/04

    DOI： 10.1088/1468-6996/10/2/024303 　

    ISSN： 1468-6996

    eISSN： 1878-5514

  262. Solution-Processible Organic Semiconductors Based on Selenophene-Containing Heteroarenes, 2,7-Dialkyl[1]benzoselenopheno[3,2-b][1]benzoselenophenes (C-n-BSBSs): Syntheses, Properties, Molecular Arrangements, and Field-Effect Transistor Characteristics Peer-reviewed

    Takafumi Izawa, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY OF MATERIALS　21　(5)　903-912　2009/03

    DOI： 10.1021/cm8030126 　

    ISSN： 0897-4756

  263. Three-dimensional organic field-effect transistors: Charge accumulation in their vertical semiconductor channels Peer-reviewed

    M. Uno, I. Doi, K. Takimiya, J. Takeya

    Materials Research Society Symposium Proceedings　1154　137-142　2009

    ISSN： 0272-9172

  264. Three-dimensional organic field-effect transistors with high output current and high on-off ratio Peer-reviewed

    Mayumi Uno, I. Doi, K. Takimiya, J. Takeya

    Applied Physics Letters　94　(10)　2009

    DOI： 10.1063/1.3098404 　

    ISSN： 0003-6951

  265. Moderately anisotropic field-effect mobility in dinaphtho [2,3-b: 2′, 3′-f] thiopheno [3,2-b] thiophenes single-crystal transistors Peer-reviewed

    Mayumi Uno, Y. Tominari, M. Yamagishi, I. Doi, E. Miyazaki, K. Takimiya, J. Takeya

    Applied Physics Letters　94　(22)　2009

    DOI： 10.1063/1.3153119 　

    ISSN： 0003-6951

  266. Air-stable solution-processed ambipolar organic field-effect transistors based on a dicyanomethylene-substituted terheteroquinoid derivative Peer-reviewed

    Sayuri Handa, Eigo Miyazaki, Kazuo Takimiya

    CHEMICAL COMMUNICATIONS　(26)　3919-3921　2009

    DOI： 10.1039/b905472c 　

    ISSN： 1359-7345

  267. 5-Hexylthiophene-fused porphyrazines: new soluble phthalocyanines for solution-processed organic electronic devices Peer-reviewed

    Eigo Miyazaki, Ayaka Kaku, Hiroki Mori, Masahito Iwatani, Kazuo Takimiya

    JOURNAL OF MATERIALS CHEMISTRY　19　(33)　5913-5915　2009

    DOI： 10.1039/b910824f 　

    ISSN： 0959-9428

  268. Raman Spectroscopy Shows Interchain through Space Charge Delocalization in a Mixed Valence Oligothiophene Cation and in Its pi-Dimeric Biradicaloid Dication Peer-reviewed

    Juan Casado, Kazuo Takimiya, Tetsuo Otsubo, Francisco J. Ramirez, J. Joaquin Quirante, Rocio Ponce Ortiz, Sandra R. Gonzalez, Maria Moreno Oliva, Juan T. Lopez Navarrete

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　130　(43)　14028-+　2008/10

    DOI： 10.1021/ja806207J 　

    ISSN： 0002-7863

  269. Synthesis and Characterization of N-Acyl-substituted PyrroloTTF Derivatives and Improved Air-stability of PyrroloTTF-based OFETs Peer-reviewed

    Iori Doi, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY LETTERS　37　(10)　1088-1089　2008/10

    DOI： 10.1246/cl.2008.1088 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  270. Molecular ordering of high-performance soluble molecular semiconductors and re-evaluation of their field-effect transistor characteristics Peer-reviewed

    Takafumi Izawa, Eigo Miyazaki, Kazuo Takimiya

    ADVANCED MATERIALS　20　(18)　3388-+　2008/09

    DOI： 10.1002/adma.200800799 　

    ISSN： 0935-9648

  271. STRUCTURAL ASPECTS OF IODINE-PROMOTED ONE-POT CYCLIZATION OF O-BIS(METHYLTHIO)STILBENES TO THIENO[3,2-b]THIOPHENE DERIVATIVES: SYNTHETIC TRIALS OF TETRATHIENOACENES FROM 1,2-BIS(3-METHYLTHIOTHIOPHEN-2-YL)ETHENES Peer-reviewed

    Tatsuya Yamamoto, Eigo Miyazaki, Kazuo Takimiya

    HETEROCYCLES　76　(1)　583-593　2008/09

    ISSN： 0385-5414

    eISSN： 1881-0942

  272. Antiferromagnetic ordering of the incommensurate organic superconductor (MDT-TS)(AuI2)(0.441) with a high spin-flop field Peer-reviewed

    Tadashi Kawamoto, Yoshimasa Bando, Takehiko Mori, Takako Konoike, Yamaguchi Takahide, Taichi Terashima, Shinya Uji, Kazuo Takimiya, Tetsuo Otsubo

    PHYSICAL REVIEW B　77　(22)　2008/06

    DOI： 10.1103/PhysRevB.77.224506 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  273. Electrical characteristics of single-component ambipolar organic field-effect transistors and effects of air exposure on them Peer-reviewed

    Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi, Kazuo Takimiya, Akio Toshimitsu

    JOURNAL OF APPLIED PHYSICS　103　(9)　2008/05

    DOI： 10.1063/1.2919738 　

    ISSN： 0021-8979

  274. 2,6-dialkylbenzo[1,2-b : 4,5-b ']dithiophenes (C-n-BDTs) as soluble organic semiconductors for solution-processed organic field-effect transistors Peer-reviewed

    Tomoya Kashiki, Eigo Miyazaki, Kazuo Takimiya

    CHEMISTRY LETTERS　37　(3)　284-285　2008/03

    DOI： 10.1246/cl.2008.284 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  275. Fluorescence up-conversion study of excitation energy transport dynamics in oligothiophene-fullerene linked dyads Peer-reviewed

    Takumi Nakamura, Yasuyuki Araki, Osamu Ito, Kazuo Takimiya, Tetsuo Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY A　112　(6)　1125-1132　2008/02

    DOI： 10.1021/jp710115z 　

    ISSN： 1089-5639

  276. Organic semiconductors for stable, high-performance thin-film transistors

    K. Takimiya, E. Miyazaki, T. Yamamoto

    IDW '08 - Proceedings of the 15th International Display Workshops　1　57-60　2008

  277. New organic semiconductors for stable, high-performance organic thin-film transistors

    Kazuo Takimiya, Eigo Miyazaki, Tatsuya Yamamoto, Takafumi Izawa

    Proceedings of International Meeting on Information Display　8　975-978　2008

    ISSN： 1738-7558

  278. Giant nonlinear conductivity and spontaneous current oscillation in an incommensurate organic superconductor Peer-reviewed

    Takehiko Mori, Yoshimasa Bando, Tadashi Kawamoto, Ichiro Terasaki, Kazuo Takimiya, Tetsuo Otsubo

    PHYSICAL REVIEW LETTERS　100　(3)　2008/01

    DOI： 10.1103/PhysRevLett.100.037001 　

    ISSN： 0031-9007

  279. Isotropic uniaxial strain effect on the incommensurate organic superconductor: (MDT-TS)(AuI2)(0.441) Peer-reviewed

    Yoshimasa Bando, Tadashi Kawamoto, Takehiko Mori, Kazuo Takimiya, Tetsuo Otsubo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　77　(1)　2008/01

    DOI： 10.1143/JPSJ.77.014706 　

    ISSN： 0031-9015

  280. A high mobility ambipolar field effect transistor using a 2,6-diphenylbenzo[1,2-b : 4,5-b']diselenophene/fullerene double layer Peer-reviewed

    Shohei Kinoshita, Tomo Sakanoue, Masayuki Yahiro, Kazuo Takimiya, Hideaki Ebata, Masaaki Ikeda, Hirokazu Kuwabara, Chihaya Adachi

    SOLID STATE COMMUNICATIONS　145　(3)　114-117　2008/01

    DOI： 10.1016/j.ssc.2007.10.017 　

    ISSN： 0038-1098

  281. Highly soluble [1]benzothieno[3,2-b]benzothiophene (BTBT) derivatives for high-performance, solution-processed organic field-effect transistors Peer-reviewed

    Hideaki Ebata, Takafumi Izawa, Eigo Miyazaki, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuto Yui

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　129　(51)　15732-+　2007/12

    DOI： 10.1021/ja074841i 　

    ISSN： 0002-7863

  282. Development of n-alkyl-substituted bis(pyrrolo[3,4-d])tetrathiafulvalenes as organic semiconductors for solution-processible field-effect transistors semiconductors Peer-reviewed

    Iori Doi, Eigo Miyazaki, Kazuo Takimiya, Yoshihito Kunugi

    CHEMISTRY OF MATERIALS　19　(22)　5230-5237　2007/10

    DOI： 10.1021/cm070956 　

    ISSN： 0897-4756

  283. Synthesis, properties, and structures of benzo[1,2-b : 4,5-b ']bis[b]benzothiophene and benzo[1,2-b : 4,5-b ']bis[b]benzoselenophene Peer-reviewed

    Hideaki Ebata, Eigo Miyazaki, Tatsuya Yamamoto, Kazuo Takimiya

    ORGANIC LETTERS　9　(22)　4499-4502　2007/10

    DOI： 10.1021/ol701815j 　

    ISSN： 1523-7060

  284. Solution-processible n-channel organic field-effect transistors based on dicyanomethylene-substituted terthienoquinoid derivative Peer-reviewed

    Sayuri Handa, Eigo Miyazaki, Kazuo Takimiya, Yoshihito Kunugi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　129　(38)　11684-+　2007/09

    DOI： 10.1021/ja074607s 　

    ISSN： 0002-7863

  285. Conductive, magnetic, and optical properties of sterically hindered dodecithiophenes. Evidence for the coexistence of bipolaron and pi-dimer Peer-reviewed

    Tomoyuki Kurata, Takashi Mohri, Kazuo Takimiya, Tetsuo Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　80　(9)　1799-1807　2007/09

    DOI： 10.1246/bcsj.80.1799 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  286. Development of new semiconducting materials for durable high-performance air-stable organic field-effect transistors Peer-reviewed

    Kazuo Takimiya, Yoshihito Kunugi, Tetsuo Otsubo

    CHEMISTRY LETTERS　36　(5)　578-583　2007/05

    DOI： 10.1246/cl.2007.578 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  287. Design strategy for air-stable organic semiconductors applicable to high-performance field-effect transistors Peer-reviewed

    Kazuo Takimiya, Tatsuya Yamamoto, Hideaki Ebata, Takafumi Izawa

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS　8　(4)　273-276　2007/05

    DOI： 10.1016/j.stam.2007.02.010 　

    ISSN： 1468-6996

  288. Facile synthesis of highly pi-extended heteroarenes, dinaphtho[2,3-b : 2 ',3 '-f]chalcogenopheno[3,2-b]chalcogenophenes, and their application to field-effect transistors Peer-reviewed

    Tatsuya Yamamoto, Kazuo Takimiya

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　129　(8)　2224-+　2007/02

    DOI： 10.1021/ja068429z 　

    ISSN： 0002-7863

  289. Syntheses, structures, and spectroscopic properties of push-pull heteroquinoid compounds Peer-reviewed

    Shinobu Inoue, Shinji Mikami, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso

    HETEROCYCLES　71　(2)　253-268　2007/02

    ISSN： 0385-5414

  290. Sodium ion effect on photoinduced electron transfer of porphyrin-crown ether-affixed quaterthiophene-[60]fullerene triad as a gated molecular switch Peer-reviewed

    Yasuyuki Araki, Huimin Zhang, Osamu Ito, Takuro Oike, Tomoyuki Kurata, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso

    ECS Transactions　2　(12)　51-62　2007

    DOI： 10.1149/1.2408952 　

    ISSN： 1938-5862 1938-6737

  291. FET characteristics of dinaphthothienothiophene (DNTT) on Si/SiO2 substrates with various surface-modifications Peer-reviewed

    Tatsuya Yamamoto, Kazuo Takimiya

    JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY　20　(1)　57-59　2007

    DOI： 10.2494/photopolymer.20.57 　

    ISSN： 0914-9244

  292. On the biradicaloid nature of long quinoidal oligothiophenes: Experimental evidence guided by theoretical studies Peer-reviewed

    Rocio Ponce Ortiz, Juan Casado, Victor Hernandez, Juan T. Lopez Navarrete, Pedro M. Viruela, Enrique Orti, Kazuo Takimiya, Tetsuo Otsubo

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　46　(47)　9057-9061　2007

    DOI： 10.1002/anie.200703244 　

    ISSN： 1433-7851

  293. 2,7-Diphenyl[1]benzothieno[3,2-b]benzothiophene, a new organic semiconductor for air-stable organic field-effect transistors with mobilities up to 2.0 cm(2) V-1 s(-1) Peer-reviewed

    Kazuo Takimiya, Hideaki Ebata, Katsuhiro Sakamoto, Takafumi Izawa, Tetsuo Otsubo, Yoshihito Kunugi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　128　(39)　12604-12605　2006/10

    DOI： 10.1021/ja064052l 　

    ISSN： 0002-7863

  294. Molecular modification of 2,6-diphenylbenzo[1,2-b : 4,5-b ']dichalcogenophenes by introduction of strong electron-withdrawing groups: Conversion from p- to n-channel OFET materials Peer-reviewed

    Kazuo Takimiya, Yoshihito Kunugi, Hideaki Ebata, Tetsuo Otsubo

    CHEMISTRY LETTERS　35　(10)　1200-1201　2006/10

    DOI： 10.1246/cl.2006.1200 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  295. Thin film characteristics and FET performances of beta-octyl-substituted long oligothiophenes Peer-reviewed

    Kazuo Takimiya, Katsuhiro Sakamoto, Tetsuo Otsubo, Yoshihito Kunugi

    CHEMISTRY LETTERS　35　(8)　942-943　2006/08

    DOI： 10.1246/cl.2006.942 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  296. Thermodynamic study of an incommensurate organic superconductor (MDT-TSF)(AuI2)(0.436) Peer-reviewed

    Tetsushi Ishikawa, Yasuhiro Nakazawa, Satoshi Yamashita, Masaharu Oguni, Kazuya Saito, Kazuo Takimiya, Tetsuo Otsubo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　75　(7)　2006/07

    DOI： 10.1143/JPJS.75.074606 　

    ISSN： 0031-9015

  297. Current-induced metallic state in an organic (EDT-TSF)(2)GaCl4 conductor Peer-reviewed

    Hisataka Endo, Tadashi Kawamoto, Takehiko Mori, Ichiro Terasaki, Toru Kakiuchi, Hiroshi Sawa, Mie Kodani, Kazuo Takimiya, Tetsuo Otsubo

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　128　(28)　9006-9007　2006/07

    DOI： 10.1021/ja062277q 　

    ISSN： 0002-7863

  298. Hybrid organic semiconductors including chalcogen atoms in pi-conjugated skeletons. Tuning of optical, redox, and vibrational properties by heavy atom conjugation Peer-reviewed

    J Casado, MM Oliva, MCR Delgado, RP Ortiz, JJ Quirante, JTL Navarrete, K Takimiya, T Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY A　110　(23)　7422-7430　2006/06

    DOI： 10.1021/jp061154p 　

    ISSN： 1089-5639

  299. Development and photovoltaic performance of oligothiophene-sensitized TiO2 solar cells Peer-reviewed

    Koki Tanaka, Kazuo Takimiya, Tetsuo Otsubo, Koji Kawabuchi, Shotaro Kajihara, Yutaka Harima

    CHEMISTRY LETTERS　35　(6)　592-593　2006/06

    DOI： 10.1246/cl.2006.592 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  300. Synthesis and photovoltaic properties of tetrathiafulvalene-oligothiophene-fullerene triads Peer-reviewed

    Hiroki Kanato, Masashi Narutaki, Kazuo Takimiya, Tetsuo Otsubo, Yutaka Harima

    CHEMISTRY LETTERS　35　(6)　668-669　2006/06

    DOI： 10.1246/cl.2006.668 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  301. Charge transfer degree and superconductivity of the incommensurate organic superconductor (MDT-TSF)(I3)0.422

    Kawamoto Tadashi, Mori Takehiko, Konoike Takako, Enomoto Kengo, Terashima Taichi, Uji Shinya, Kitagawa Hiroshi, Takimiya Kazuo, Otsubo Tetsuo

    Physical Review B - Condensed Matter and Materials Physics　73　(9)　94513-1-094513-8　2006/03/24

    Publisher: American Physical Society

    DOI： 10.1103/PhysRevB.73.094513 　

    ISSN： 0163-1829

  302. Charge transfer degree and superconductivity of the incommensurate organic superconductor (MDT-TSF)(I-3)(0.422) Peer-reviewed

    T Kawamoto, T Mori, T Konoike, K Enomoto, T Terashima, S Uji, H Kitagawa, K Takimiya, T Otsubo

    PHYSICAL REVIEW B　73　(9)　2006/03

    DOI： 10.1103/PhysRevB.73.094513 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  303. 2,7-diphenyl[1]benzoselenopheno[3,2-b][1]benzoselenophene as a stable organic semiconductor for a high-performance field-effect transistor Peer-reviewed

    K Takimiya, Y Kunugi, Y Konda, H Ebata, Y Toyoshima, T Otsubo

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　128　(9)　3044-3050　2006/03

    DOI： 10.1021/ja057641k 　

    ISSN： 0002-7863

  304. Effects of extension or prevention of pi-conjugation on photoinduced electron transfer processes of ferrocene-oligothiophene-fullerene triads Peer-reviewed

    T Nakamura, H Kanato, Y Araki, O Ito, K Takimiya, T Otsubo, Y Aso

    JOURNAL OF PHYSICAL CHEMISTRY A　110　(10)　3471-3479　2006/03

    DOI： 10.1021/jp056436o 　

    ISSN： 1089-5639

  305. Synthesis and photophysical properties of two dual oligothiophene-fullerene linkage molecules as photoinduced long-distance charge separation systems Peer-reviewed

    M Narutaki, K Takimiya, T Otsubo, Y Harima, HM Zhang, Y Araki, S Ito

    JOURNAL OF ORGANIC CHEMISTRY　71　(5)　1761-1768　2006/03

    DOI： 10.1021/jo051821v 　

    ISSN： 0022-3263

  306. Changes in electrochemical and optical properties of oligoalkylthiophene film induced by bipolaron formation Peer-reviewed

    Y Harima, R Patil, HF Liu, Y Ooyama, K Takimiya, T Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY B　110　(4)　1529-1535　2006/02

    DOI： 10.1021/jp054863w 　

    ISSN： 1520-6106

  307. Synthesis and properties of ethylenethiotetraselenafulvalene (ET-TSF) and its conductive radical cation salts Peer-reviewed

    K Takimiya, M Kodani, S Murakami, T Otsubo, Y Aso

    HETEROCYCLES　67　(2)　655-+　2006/02

    DOI： 10.3987/COM-05-S(T)48 　

    ISSN： 0385-5414

  308. Development of novel oligothiophenes modified with the triphenylamine group as a donor unit and the oxadiazole group as an acceptor unit and their application to OLED devices

    Kazuki Kouyama, Kazuo Takimiya, Tetsuo Otsubo

    Polymer Preprints, Japan　55　(1)　1422　2006

  309. Fermi surface of the organic superconductor (MDT-ST)(I-3)(0.417) reconstructed by incommensurate potential Peer-reviewed

    T Kawamoto, T Mori, K Enomoto, T Konoike, T Terashima, S Uji, A Takamori, K Takimiya, T Otsubo

    PHYSICAL REVIEW B　73　(2)　2006/01

    DOI： 10.1103/PhysRevB.73.024503 　

    ISSN： 1098-0121

  310. Conducting polymer films with new organic donor MDT-TSF: preparation and properties Peer-reviewed

    A. Tracz, A. Mierczynska, K. Takimiya, T. Otsubo, N. Niihara, J. K. Jeszka

    MATERIALS SCIENCE-POLAND　24　(2)　517-526　2006

    ISSN： 0137-1339

  311. Organic field-effect transistors based on 2,6-diphenylbenzo [1,2-b : 5,4-b ']-dithiophene and -diselenophene (iso-DPh-BDXs) Peer-reviewed

    Kazuo Takimiya, Yasushi Konda, Hideaki Ebata, Tetsuo Otsubo, Yoshihito Kunugi

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　455　361-365　2006

    DOI： 10.1080/15421400600698980 　

    ISSN： 1542-1406

  312. Unusual electrochemical response of oligoalkylthiophene films: Involvement of bipolarons Peer-reviewed

    Hongfang Liu, Yutaka Harima, Rahul Patil, Xiaoqing Jiang, Yousuke Ooyama, Kazuo Takimiya, Tetsuo Otsubo

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　455　367-372　2006

    DOI： 10.1080/15421400600698972 　

    ISSN： 1542-1406

    eISSN： 1563-5287

  313. Synthesis and spectral properties of tris(terphenylylpyridine)iridium and tris(tritylphenylpyridine)iridium complexes as novel electrophosphorescent materials Peer-reviewed

    Chie Honda, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　455　373-379　2006

    DOI： 10.1080/15421400600698964 　

    ISSN： 1542-1406

  314. Facile synthesis, structure, and properties of benzo[1,2-b : 4,5-b ']dichalcogenophenes Peer-reviewed

    K Takimiya, Y Konda, H Ebata, N Niihara, T Otsubo

    JOURNAL OF ORGANIC CHEMISTRY　70　(25)　10569-10571　2005/12

    DOI： 10.1021/jo051812m 　

    ISSN： 0022-3263

  315. Fullerene-tethered oligothiophenes as advanced molecular electronics materials Peer-reviewed

    T Otsubo, Y Aso, K Takimiya

    PURE AND APPLIED CHEMISTRY　77　(12)　2003-2010　2005/12

    DOI： 10.1351/pac200577122003 　

    ISSN： 0033-4545

  316. Polyether-bridged sexithiophene as a complexation-gated molecular wire for intramolecular photoinduced electron transfer Peer-reviewed

    T Oike, T Kurata, K Takimiya, T Otsubo, Y Aso, HM Zhang, Y Araki, O Ito

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(44)　15372-15373　2005/11

    DOI： 10.1021/ja055648w 　

    ISSN： 0002-7863

  317. A practical two-step synthesis of tetraselenafulvalene (TSF) Peer-reviewed

    K Takimiya, HJ Jeon, T Otsubo

    SYNTHESIS-STUTTGART　(16)　2810-2813　2005/10

    DOI： 10.1055/s-2005-872117 　

    ISSN： 0039-7881

  318. Molecular conductors based on peri-ditellurium-bridged donors, 2,3-DMTTeA and TMTTeN Peer-reviewed

    E Fujiwara, H Fujiwara, BZ Narymbetov, H Kobayashi, M Nakata, H Torii, A Kobayashi, K Takimiya, T Otsubo, F Ogura

    EUROPEAN JOURNAL OF INORGANIC CHEMISTRY　(17)　3435-3449　2005/09

    DOI： 10.1002/ejic.200500167 　

    ISSN： 1434-1948

  319. Synthesis and spectral properties of a highly soluble push-pull type of quinoidal thiophenes Peer-reviewed

    T Takahashi, K Takimiya, T Otsubo, Y Aso

    ORGANIC LETTERS　7　(20)　4313-4316　2005/09

    DOI： 10.1021/ol0513037 　

    ISSN： 1523-7060

  320. Oligothiophene-multifullerene linkage molecules as high performance photovoltaic materials Peer-reviewed

    N Negishi, K Takimiya, T Otsubo, Y Harima, Y Aso

    SYNTHETIC METALS　152　(1-3)　125-128　2005/09

    DOI： 10.1016/j.synthmet.2005.07.238 　

    ISSN： 0379-6779

  321. Control of photoinduced energy- and electron-transfer steps in zinc porphyrin-oligothiophene-fullerene linked triads with solvent polarity Peer-reviewed

    T Nakamura, J Ikemoto, M Fujitsuka, Y Araki, O Ito, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY B　109　(30)　14365-14374　2005/08

    DOI： 10.1021/jp044316v 　

    ISSN： 1520-6106

  322. Syntheses of 2-(pentafluorophenyl)thiophene derivatives via the palladium-catalyzed Suzuki reaction Peer-reviewed

    K Takimiya, N Niihara, T Otsubo

    SYNTHESIS-STUTTGART　(10)　1589-1592　2005/07

    DOI： 10.1055/s-2005-865335 　

    ISSN： 0039-7881

  323. Single-crystal field-effect transistors based on organic selenium-containing semiconductor Peer-reviewed

    R Zeis, C Kloc, K Takimiya, Y Kunugi, Y Konda, N Niihara, T Otsubo

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS　44　(6A)　3712-3714　2005/06

    DOI： 10.1143/JJAP.44.3712 　

    ISSN： 0021-4922

  324. Sub-5 fs time-resolved dynamic Franck-Condon overlaps associated with the S-1 -&gt; S-0 stimulated transition in oligothiophene 13-mer Peer-reviewed

    A Ozawa, K Takimiya, T Otsubo, T Kobayashi

    CHEMICAL PHYSICS LETTERS　409　(4-6)　224-229　2005/06

    DOI： 10.1016/j.cplett.2005.05.014 　

    ISSN： 0009-2614

    eISSN： 1873-4448

  325. Syntheses, structures, spectroscopic properties, and pi-dimeric interactions of [n.n]quinquethiophenophanes Peer-reviewed

    T Sakai, T Satou, T Kaikawa, K Takimiya, T Otsubo, Y Aso

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(22)　8082-8089　2005/06

    DOI： 10.1021/ja050783u 　

    ISSN： 0002-7863

  326. Extensive quinoidal oligothiophenes with dicyanomethylene groups at terminal positions as highly amphoteric redox molecules Peer-reviewed

    T Takahashi, KI Matsuoka, K Takimiya, T Otsubo, Y Aso

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(25)　8928-8929　2005/06

    DOI： 10.1021/ja051840m 　

    ISSN： 0002-7863

  327. Structural and transport properties of the incommensurate organic superconductor (MDT-ST)(I-3)(0.417) Peer-reviewed

    T Kawamoto, T Mori, S Uji, JI Yamaura, H Kitagawa, A Takamori, K Takimiya, T Otsubo

    PHYSICAL REVIEW B　71　(17)　2005/05

    DOI： 10.1103/PhysRevB.71.172503 　

    ISSN： 1098-0121

  328. Anisotropic three-dimensional superconductivity of the incommensurate organic superconductor (MDT-ST)(I-3)(0.417) Peer-reviewed

    T Kawamoto, T Mori, T Terashima, S Uji, A Takamori, K Takimiya, T Otsubo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　74　(5)　1529-1533　2005/05

    DOI： 10.1143/JPSJ.74.1529 　

    ISSN： 0031-9015

  329. 2,6-diarylnaphtho[1,8-bc : 5,4-b ' c ']dithiophenes as new high-performance semiconductors for organic field-effect transistors Peer-reviewed

    K Takimiya, Y Kunugi, Y Toyoshima, T Otsubo

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　127　(10)　3605-3612　2005/03

    DOI： 10.1021/ja043429p 　

    ISSN： 0002-7863

  330. Selenium-containing pi-conjugated compounds for electronic molecular Peer-reviewed

    K Takimiya, T Otsubo

    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS　180　(3-4)　873-881　2005/03

    DOI： 10.1080/10426500590906373 　

    ISSN： 1042-6507

  331. Superconductivity competing with the incommensurate antiferromagnetic insulating state in the organic conductor (MDT-TS)(AuI2)(0.441) Peer-reviewed

    T Kawamoto, Y Bando, T Mori, K Takimiya, T Otsubo

    PHYSICAL REVIEW B　71　(5)　2005/02

    DOI： 10.1103/PhysRevB.71.052501 　

    ISSN： 1098-0121

  332. Reevaluation of active charge carrier species in conductive polythiophene

    Takashi Mohri, Kazuo Takimiya, Tetsuo Otsubo

    Polymer Preprints, Japan　54　(2)　4131　2005

  333. Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials

    Chie Honda, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso

    Polymer Preprints, Japan　54　(1)　1340　2005

  334. High-performance otfts on flexible substrate Peer-reviewed

    Liu Chuan, Minari Takeo, Lu Xubing, Kumatani Akichika, Takimiya Kazuo, Tsukagoshi Kazuhito

    SID Symposium Digest, 2005　36　10-10　2005

    DOI： 10.1889/1.2036192 　

  335. Aminopropyl-glucose sequentially grafted mesoporous silica nanocomposite as a novel boron adsorbent Peer-reviewed

    M Yasui, M Ikeda, K Takimiya, J Ohshita, S Yamanaka, K Inumaru

    CHEMISTRY LETTERS　33　(12)　1582-1583　2004/12

    DOI： 10.1246/cl.2004.1582 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  336. Pressure-induced superconductivity in (MDT-TS)(AuI2)(0.441) [MDT- TS=5H-2-(1,3-diselenol-2-ylidene)-1,3,4,6-tetrathiapentalene]: A new organic superconductor possessing an incommensurate anion lattice Peer-reviewed

    K Takimiya, M Kodani, N Niihara, Y Aso, T Otsubo, Y Bando, T Kawamoto, T Mori

    CHEMISTRY OF MATERIALS　16　(24)　5120-5123　2004/11

    DOI： 10.1021/cm049144t 　

    ISSN： 0897-4756

  337. Synthesis and photophysical properties of ferrocene-oligothiophene-fullerene triads Peer-reviewed

    H Kanato, K Takimiya, T Otsubo, Y Aso, T Nakamura, Y Araki, O Ito

    JOURNAL OF ORGANIC CHEMISTRY　69　(21)　7183-7189　2004/10

    DOI： 10.1021/jo049137o 　

    ISSN： 0022-3263

  338. Dendrimer-encapsulated oligothiophenes Peer-reviewed

    T Otsubo, S Ueno, K Takimiya, Y Aso

    CHEMISTRY LETTERS　33　(9)　1154-1155　2004/09

    DOI： 10.1246/cl.2004.1154 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  339. Synthesis and structures of highly conducting charge-transfer salts of selenium containing TTM-TTP derivatives Peer-reviewed

    M Ashizawa, A Akutsu, B Noda, H Nii, T Kawamoto, T Mori, T Nakayashiki, Y Misaki, K Tanaka, K Takimiya, T Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　77　(8)　1449-1458　2004/08

    DOI： 10.1246/bcsj.77.1449 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  340. Photoinduced electron transfer in porphyrin-oligothiophene-fullerene linked triads by excitation of a porphyrin moiety Peer-reviewed

    T Nakamura, M Fujitsuka, Y Araki, O Ito, J Ikemoto, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY B　108　(30)　10700-10710　2004/07

    DOI： 10.1021/jp049122u 　

    ISSN： 1520-6106

  341. A Raman and computational study of two dithienyl naphthodithiophenes: Synthesis and characterization of new polymers showing low band gap optical and electroactive features Peer-reviewed

    J Casado, JJ Quirante, Hernandez, V, JTL Navarrete, K Takimiya, T Otsubo

    JOURNAL OF PHYSICAL CHEMISTRY B　108　(23)　7611-7619　2004/06

    DOI： 10.1021/jp040110i 　

    ISSN： 1520-6106

  342. Synthesis and photovoltaic effects of oligothiophenes incorporated with two [60]fullerenes Peer-reviewed

    N Negishi, K Takimiya, T Otsubo, Y Harima, Y Aso

    CHEMISTRY LETTERS　33　(6)　654-655　2004/06

    DOI： 10.1246/cl.2004.654 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  343. Molecular modifications of methylenedithio-tetraselenafulvalene (MDT-TSF) and methylenedithio-diselenadithiafulvalene (MDT-ST) for superior electron donors Peer-reviewed

    K Takimiya, Y Kataoka, Y Nakamura, Y Aso, T Otsubo

    SYNTHESIS-STUTTGART　(9)　1315-1320　2004/06

    DOI： 10.1055/s-2004-822362 　

    ISSN： 0039-7881

  344. Vapour deposited films of quinoidal biselenophene and bithiophene derivatives as active layers of n-channel organic field-effect transistors Peer-reviewed

    Y Kunugi, K Takimiya, Y Toyoshima, K Yamashita, Y Aso, T Otsubo

    JOURNAL OF MATERIALS CHEMISTRY　14　(9)　1367-1369　2004/05

    DOI： 10.1039/b401209g 　

    ISSN： 0959-9428

  345. 2,6-diphenylbenzo[1,2-b : 4,5-b ']dichalcogenophenes: a new class of high-performance semiconductors for organic field-effect transistors Peer-reviewed

    K Takimiya, Y Kunugi, Y Konda, N Niihara, T Otsubo

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　126　(16)　5084-5085　2004/04

    DOI： 10.1021/ja0496930 　

    ISSN： 0002-7863

  346. Incommensurate structure and the superconducting properties of the organic superconductor (MDT-ST)(I-3)(0.417) Peer-reviewed

    T Kawamoto, T Mori, T Terashima, S Uji, H Kitagawa, K Takimiya, A Takamori, T Otsubo

    JOURNAL DE PHYSIQUE IV　114　517-519　2004/04

    DOI： 10.1051/jp4:2004114121 　

    ISSN： 1155-4339

  347. alpha,omega-bis(quinquethienyl)alkanes as a pi-dimer model of polythiophene Peer-reviewed

    T Satou, T Sakai, T Kaikawa, K Takimiya, T Otsubo, Y Aso

    ORGANIC LETTERS　6　(6)　997-1000　2004/03

    DOI： 10.1021/ol0499396 　

    ISSN： 1523-7060

  348. Recent development of organic conductors containing selenium atoms: New synthetic methods, electron donors, and conductors Peer-reviewed

    K Takimiya, T Otsubo, Y Aso

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN　62　(2)　150-161　2004/02

    DOI： 10.5059/yukigoseikyokaishi.62.150 　

    ISSN： 0037-9980

  349. Photoinduced electron transfer in porphyrin-oligothiophene-fullerene linked triads

    Takumi Nakamura, Mamoru Fujitsuka, Yasuyuki Araki, Osamu Ito, Junya Ikemoto, Kazuo Takimiya, Yoshio Aso, Tetsuo Otsubo

    Proceedings - Electrochemical Society　PV 2004-12　210-231　2004

  350. Recent synthetic advances of tetrathiafulvalene-based organic conductors Peer-reviewed

    T Otsubo, K Takimiya

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　77　(1)　43-58　2004/01

    DOI： 10.1246/bcsj.77.43 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  351. An ambipolar organic field-effect transistor using oligothiophene incorporated with two [60]fullerenes Peer-reviewed

    Y Kunugi, K Takimiya, N Negishi, T Otsubo, Y Aso

    JOURNAL OF MATERIALS CHEMISTRY　14　(19)　2840-2841　2004

    DOI： 10.1039/b412177e 　

    ISSN： 0959-9428

  352. Synthesis and structures of neutral crystals and charge-transfer salts of selenium containing TMET-TTP derivatives Peer-reviewed

    M Ashizawa, H Nii, T Mori, Y Misaki, K Tanaka, K Takimiya, T Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　76　(11)　2091-2097　2003/11

    DOI： 10.1246/bcsj.76.2091 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  353. Electronic state anisotropy and the Fermi surface topology of the incommensurate organic superconducting crystal (MDT-TSF)(AuI2)(0.436) Peer-reviewed

    T Kawamoto, T Mori, C Terakura, T Terashima, S Uji, H Tajima, K Takimiya, Y Aso, T Otsubo

    EUROPEAN PHYSICAL JOURNAL B　36　(2)　161-167　2003/11

    DOI： 10.1140/epjb/e2003-00330-1 　

    ISSN： 1434-6028

  354. New organic superconductors with an incommensurate anion lattice consisting of polyhalide chains (MDT-TSF)X-y (MDT-TSF = methylenedithiotetraselenafulvalene; X = halogen; y=1.27-1.29) Peer-reviewed

    K Takimiya, M Kodani, Y Kataoka, Y Aso, T Otsubo, T Kawamoto, T Mori

    CHEMISTRY OF MATERIALS　15　(17)　3250-3255　2003/08

    DOI： 10.1021/cm034222i 　

    ISSN： 0897-4756

  355. A general method for the synthesis of alkylenedithio- and bis(alkylenedithio)tetraselenafulvalenes Peer-reviewed

    K Takimiya, Y Kataoka, N Niihara, Y Aso, T Otsubo

    JOURNAL OF ORGANIC CHEMISTRY　68　(13)　5217-+　2003/06

    DOI： 10.1021/jo034145a 　

    ISSN： 0022-3263

  356. Synthesis and spectroscopic properties of a series of beta-blocked long oligothiophenes up to the 96-mer: Revaluation of effective conjugation length Peer-reviewed

    T Izumi, S Kobashi, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　125　(18)　5286-5287　2003/05

    DOI： 10.1021/ja034333i 　

    ISSN： 0002-7863

  357. Oligothiophene/fullerene dyads as active photovoltaic materials Peer-reviewed

    N Negishi, K Yamada, K Takimiya, Y Aso, T Otsubo, Y Harima

    CHEMISTRY LETTERS　32　(4)　404-405　2003/04

    DOI： 10.1246/cl.2003.404 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  358. Synthesis and properties of selenium containing TTM-TTP conductors Peer-reviewed

    M Ashizawa, H Nii, T Kawamoto, T Mori, Y Misaki, K Tanaka, K Takimiya, T Otsubo

    SYNTHETIC METALS　135　(1-3)　627-628　2003/04

    DOI： 10.1016/S0379-6779(02)00814-7 　

    ISSN： 0379-6779

  359. Organic superconductors based on a new electron donor, methylenedithio-diselenadithiafulvalene (MDT-ST) Peer-reviewed

    K Takimiya, A Takamori, Y Aso, T Otsubo, T Kawamoto, T Mori

    CHEMISTRY OF MATERIALS　15　(6)　1225-1227　2003/03

    DOI： 10.1021/cm025758r 　

    ISSN： 0897-4756

  360. Synthesis and properties of conductive radical cation salts of MDT-TSF (methylenedithiotetraselenafulvalene) Peer-reviewed

    K Takimiya, Y Kataoka, M Kodani, Y Aso, T Otsubo

    SYNTHETIC METALS　133　185-187　2003/03

    DOI： 10.1016/S0379-6779(02)00382-X 　

    ISSN： 0379-6779

  361. Synthetic studies of extraordinarily long oligothiophenes Peer-reviewed

    T Otsubo, Y Aso, K Takimiya, H Nakanishi, N Sumi

    SYNTHETIC METALS　133　325-328　2003/03

    DOI： 10.1016/S0379-6779(02)00376-4 　

    ISSN： 0379-6779

  362. Incommensurate anion potential effect on the electronic states of the organic superconductor (MDT-TSF) (AuI2)0.436

    Tadashi Kawamoto, Takehiko Mori, Chieko Terakura, Taichi Terashima, Shinya Uji, Kazuo Takimiya, Yoshio Aso, Tetsuo Otsubo

    Physical Review B - Condensed Matter and Materials Physics　67　(2)　205081-205084　2003/01/01

    ISSN： 0163-1829

  363. Organic field-effect transistor using oligoselenophene as an active layer Peer-reviewed

    Y Kunugi, K Takimiya, K Yamane, K Yamashita, Y Aso, T Otsubo

    CHEMISTRY OF MATERIALS　15　(1)　6-7　2003/01

    DOI： 10.1021/cm020949f 　

    ISSN： 0897-4756

  364. Incommensurate anion potential effect on the electronic states of the organic superconductor (MDT-TSF) (AuI2)(0.436) Peer-reviewed

    T Kawamoto, T Mori, C Terakura, T Terashima, S Uji, K Takimiya, Y Aso, T Otsubo

    PHYSICAL REVIEW B　67　(2)　2003/01

    DOI： 10.1103/PhysRevB.67.020508 　

    ISSN： 1098-0121

  365. TTF-porphyrin dyads as novel photoinduced electron transfer systems Peer-reviewed

    S Sadaike, K Takimiya, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　44　(1)　161-165　2003/01

    DOI： 10.1016/S0040-4039(02)02474-7 　

    ISSN： 0040-4039

  366. Novel conductive radical cation salts based on methylenediselenotetraselenafulvalene (MDSe-TSF): A sign of superconductivity in kappa-(MDSe-TSF)(2)Br below 4 K Peer-reviewed

    M Kodani, A Takamori, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF SOLID STATE CHEMISTRY　168　(2)　582-589　2002/11

    DOI： 10.1006/jssc.2002.9755 　

    ISSN： 0022-4596

  367. Structures and transport properties of new molecular conductors based on TMEO-ST-TTP Peer-reviewed

    Y Misaki, M Taniguchi, K Tanaka, K Takimiya, A Morikami, T Otsubo, T Mori

    JOURNAL OF SOLID STATE CHEMISTRY　168　(2)　608-615　2002/11

    DOI： 10.1006/jssc.2002.9758 　

    ISSN： 0022-4596

  368. Positional order and disorder of symmetric and unsymmetric BEDT-STF salts Peer-reviewed

    H Mori, H Suzuki, T Okano, H Moriyama, Y Nishio, K Kajita, M Kodani, K Takimiya, T Otsubo

    JOURNAL OF SOLID STATE CHEMISTRY　168　(2)　626-631　2002/11

    DOI： 10.1006/jssc.2002.9760 　

    ISSN： 0022-4596

  369. Organic field-effect transistors using di(2-thienyl)naphthodithiophenes as active layers Peer-reviewed

    Y Kunugi, K Takimiya, K Yamashita, Y Aso, T Otsubo

    CHEMISTRY LETTERS　(10)　958-959　2002/10

    DOI： 10.1246/cl.2002.958 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  370. Synthesis, structures, and properties of two isomeric naphthodithiophenes and their methyl, methylthio, and 2-thienyl derivatives; Application to conductive charge-transfer complexes and low-bandgap polymers Peer-reviewed

    K Takimiya, K Kato, Y Aso, F Ogura, T Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　75　(8)　1795-1805　2002/08

    DOI： 10.1246/bcsj.75.1795 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  371. Oligo(octithienylene-diethynylene)s as unprecedentedly long conjugated nanomolecules Peer-reviewed

    K Inouchi, S Kobashi, K Takimiya, Y Aso, T Otsubo

    ORGANIC LETTERS　4　(15)　2533-2536　2002/07

    DOI： 10.1021/ol026150r 　

    ISSN： 1523-7060

  372. Synthetic procedure for various selenium-containing electron donors of the bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) type Peer-reviewed

    K Takimiya, T Jigami, M Kawashima, M Kodani, Y Aso, T Otsubo

    JOURNAL OF ORGANIC CHEMISTRY　67　(12)　4218-4227　2002/06

    DOI： 10.1021/jo016393h 　

    ISSN： 0022-3263

  373. Organic superconductor with an incommensurate anion structure: (MDT-TSF)(AuI2)0.44

    Tadashi Kawamoto, Takehiko Mori, Kazuo Takimiya, Yoshiro Kataoka, Yoshio Aso, Tetsuo Otsubo

    Physical Review B - Condensed Matter and Materials Physics　65　(14)　1405081-1405084　2002/04/01

    Publisher: American Physical Society

    ISSN： 0163-1829

  374. Organic superconductor with an incommensurate anion structure: (MDT-TSF)(AuI2)(0.44) Peer-reviewed

    T Kawamoto, T Mori, K Takimiya, Y Kataoka, Y Aso, T Otsubo

    PHYSICAL REVIEW B　65　(14)　2002/04

    DOI： 10.1103/PhysRevB.65.140508 　

    ISSN： 1098-0121

  375. Porphyrin-oligothiophene-fullerene triads as an efficient intramolecular electron-transfer system Peer-reviewed

    J Ikemoto, K Takimiya, Y Aso, T Otsubo, M Fujitsuka, O Ito

    ORGANIC LETTERS　4　(3)　309-311　2002/02

    DOI： 10.1021/ol016511n 　

    ISSN： 1523-7060

  376. Large photocurrent generation of gold electrodes modified with [60]fullerene-linked oligothiophenes bearing a tripodal rigid anchor Peer-reviewed

    D Hirayama, K Takimiya, Y Aso, T Otsubo, T Hasobe, H Yamada, H Imahori, S Fukuzumi, Y Sakata

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　124　(4)　532-533　2002/01

    DOI： 10.1021/ja016703d 　

    ISSN： 0002-7863

  377. Functional oligothiophenes as advanced molecular electronic materials Peer-reviewed

    T Otsubo, Y Aso, K Takimiya

    JOURNAL OF MATERIALS CHEMISTRY　12　(9)　2565-2575　2002

    DOI： 10.1039/b203780g 　

    ISSN： 0959-9428

  378. Synthesis and properties of nano-scale oligothiophenes: From conducting-polymer models to materials for molecular electronics Peer-reviewed

    Y Aso, K Takimiya, T Otsubo

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN　60　(1)　52-61　2002/01

    DOI： 10.5059/yukigoseikyokaishi.60.52 　

    ISSN： 0037-9980

  379. Synthesis and properties of selenium containing dmit-type complexes Peer-reviewed

    K Takimiya, K Yamane, Y Aso, T Otsubo

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　379　65-70　2002

    DOI： 10.1080/10587250290090273 　

    ISSN： 1058-725X

  380. Synthesis and properties of novel unsymmetrical tetraselenafulvalene donors, EDT-PT-TSF and EDT-PS-TSF Peer-reviewed

    K Takimiya, S Murakami, M Kodani, Y Aso, T Otsubo

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　380　189-195　2002

    DOI： 10.1080/10587250290101568 　

    ISSN： 1058-725X

  381. Structures and properties of radical cation salts of novel tetraselenafulvalene derivatives (BPT-TSF, EDT-PT-TSF, and BEST-TSF) with MX4(M = Fe, Ga, X = Cl, Br)-type anions Peer-reviewed

    M Kodani, S Murakami, T Jigami, K Takimiya, Y Aso, T Otsubo

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS　376　47-52　2002

    DOI： 10.1080/10587250210780 　

    ISSN： 1058-725X

  382. Synthesis, optical, and conductive properties of long oligothiophenes and their utilization as molecular wires Peer-reviewed

    T Otsubo, Y Aso, K Takimiya

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　74　(10)　1789-1801　2001/10

    DOI： 10.1246/bcsj.74.1789 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  383. Synthesis and photophysical properties of [60]fullerene-oligo(thienylene-ethynylene) dyads Peer-reviewed

    Y Obara, K Takimiya, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　42　(39)　6877-6881　2001/09

    DOI： 10.1016/S0040-4039(01)01398-3 　

    ISSN： 0040-4039

  384. Effective synthesis of 1,3-diselenole-2-selone-4,5-diselenolate (dsis) and its utilization for the synthesis of selenocycle-fused tetraselenafulvalene (TSF) derivatives Peer-reviewed

    M Kodani, K Takimiya, Y Aso, T Otsubo, T Nakayashiki, Y Misaki

    SYNTHESIS-STUTTGART　(11)　1614-1618　2001/08

    DOI： 10.1055/s-2001-16755 　

    ISSN： 0039-7881

  385. Synthesis and properties of higher-order tetrathiafulvalene oligomers up to the dodecamer Peer-reviewed

    T Kageyama, S Ueno, K Takimiya, Y Aso, T Otsubo

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY　(15)　2983-2987　2001/08

    DOI： 10.1002/1099-0690(200108)2001:15<2983::AID-EJOC2983>3.0.CO;2-6 　

    ISSN： 1434-193X

  386. Synthesis and properties of a series of the longest oligothiophenes up to the 48-mer Peer-reviewed

    N Sumi, H Nakanishi, S Ueno, K Takimiya, Y Aso, T Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　74　(5)　979-988　2001/05

    DOI： 10.1246/bcsj.74.979 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  387. Spectral properties of the longest oligothiophenes in the oxidation states Peer-reviewed

    H Nakanishi, N Sumi, S Ueno, K Takimiya, Y Aso, T Otsubo, K Komaguchi, M Shiotani, N Ohta

    SYNTHETIC METALS　119　(1-3)　413-414　2001/03

    DOI： 10.1016/S0379-6779(00)01180-2 　

    ISSN： 0379-6779

  388. Electronic structures of organic salt DMTSA-BF4 using photoelectron spectromicroscopy Peer-reviewed

    Y Haruyama, T Kinoshita, K Takimiya, T Otsubo, C Nakano, K Yakushi

    JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA　114　1013-1018　2001/03

    DOI： 10.1016/S0368-2048(00)00328-5 　

    ISSN： 0368-2048

  389. Halogen substituted tetraselenafulvalene derivatives Peer-reviewed

    K Takimiya, Y Kataoka, A Morikami, Y Aso, T Otsubo

    SYNTHETIC METALS　120　(1-3)　875-876　2001/03

    DOI： 10.1016/S0379-6779(00)00814-6 　

    ISSN： 0379-6779

  390. Control of electronic states by bandwidth and band filling in organic conductors Peer-reviewed

    H Mori, T Okano, M Kamiya, M Haemori, H Suzuki, S Tanaka, M Tamura, Y Nishio, K Kajita, M Kodani, K Takimiya, T Otsubo, H Moriyama

    SYNTHETIC METALS　120　(1-3)　979-980　2001/03

    DOI： 10.1016/S0379-6779(00)00805-5 　

    ISSN： 0379-6779

  391. Low temperature X-ray and ESR study of Quasi-1D DMTCA-BF4 (C = S, Se) with half-filled band Peer-reviewed

    T Kambe, N Fujimura, Y Nogami, K Oshima, K Yakushi, J Dong, K Takimiya, T Otsubo

    SYNTHETIC METALS　120　(1-3)　931-932　2001/03

    DOI： 10.1016/S0379-6779(00)01126-7 　

    ISSN： 0379-6779

  392. Methyl and dimethyl derivatives of tetrathionaphthalene and tetraselenonaphthalene as novel electron donors Peer-reviewed

    T Kodama, M Kodani, K Takimiya, Y Aso, T Otsubo

    HETEROATOM CHEMISTRY　12　(4)　287-292　2001

    DOI： 10.1002/hc.1046 　

    ISSN： 1042-7163

  393. Quasi one-dimensional organic superconductor MDT-TSF center dot AuI2 with T-c =4.5 K at ambient pressure Peer-reviewed

    K Takimiya, Y Kataoka, Y Aso, T Otsubo, H Fukuoka, S Yamanaka

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　40　(6)　1122-+　2001

    DOI： 10.1002/1521-3773(20010316)40:6<1122::AID-ANIE11220>3.0.CO;2-V 　

    ISSN： 1433-7851

  394. Novel tellurium containing fulvalene-type electron donors, triselenatellurafulvalene (TSTeF) and diselenaditellurafulvalene (DSDTeF); synthesis, conductivities and crystal structures of their TCNQ complexes Peer-reviewed

    A Morikami, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF MATERIALS CHEMISTRY　11　(10)　2431-2436　2001

    DOI： 10.1039/b104402h 　

    ISSN： 0959-9428

  395. Synthesis and properties of novel heterocycle-fused TTF-type electron donors: bis(propylenethio)tetrathiafulvalene (BPT-TTF), bis(propyleneseleno)tetrathiafulvalene (BPS-TTF), and their tetraselenafulvalene analogues (BPT-TSF and BPS-TSF) Peer-reviewed

    T Jigami, M Kodani, S Murakami, K Takimiya, Y Aso, T Otsubo

    JOURNAL OF MATERIALS CHEMISTRY　11　(4)　1026-1033　2001

    DOI： 10.1039/b009700o 　

    ISSN： 0959-9428

  396. Bis(ethylenethio)tetraselenafulvalene and related hybrid diselenadithiafulvalenes as novel electron donors forming highly conductive complexes with 7,7,8,8-tetracyanoquinodimethane Peer-reviewed

    M Kodani, S Murakami, T Jigami, K Takimiya, Y Aso, T Otsubo

    HETEROCYCLES　54　(1)　225-235　2001/01

    ISSN： 0385-5414

  397. Synthetic methods of selenium- and tellurium variants of tetrathiafulvalene electron donors Peer-reviewed

    T Otsubo, K Takimiya, Y Aso

    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS　171　231-253　2001

    DOI： 10.1080/10426500108046635 　

    ISSN： 1042-6507

  398. Synthesis and spectroscopic properties of [2.2]quinquethiophenophane as an ideal pi-dimer model Peer-reviewed

    T Kaikawa, K Takimiya, Y Aso, T Otsubo

    ORGANIC LETTERS　2　(26)　4197-4199　2000/12

    DOI： 10.1021/ol006745r 　

    ISSN： 1523-7060

  399. Pyrrolo-annelated tetrathiafulvalenes: The parent systems Peer-reviewed

    JO Jeppesen, K Takimiya, F Jensen, T Brimert, K Nielsen, N Thorup, J Becher

    JOURNAL OF ORGANIC CHEMISTRY　65　(18)　5794-5805　2000/09

    DOI： 10.1021/jo000742a 　

    ISSN： 0022-3263

  400. Improved synthesis of double-bridged tetraselenafulvalenophanes and formation of their conductive radical cation salts Peer-reviewed

    K Takimiya, A Oharuda, A Morikami, Y Aso, T Otsubo

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY　(17)　3013-3019　2000/09

    DOI： 10.1002/1099-0690(200009)2000:17<3013::AID-EJOC3013>3.0.CO;2-# 　

    ISSN： 1434-193X

  401. The first electrochemically active cuppedophanes: Bis(tetrathiafulvalene)cuppedophanes Peer-reviewed

    JO Jeppesen, K Takimiya, J Becher

    ORGANIC LETTERS　2　(16)　2471-2473　2000/08

    DOI： 10.1021/ol000138m 　

    ISSN： 1523-7060

  402. Synthesis, structures, and properties of a series of double-bridged tetrathiafulvalenophanes as novel electron donors for conductive radical cation salts Peer-reviewed

    K Takimiya, A Oharuda, Y Aso, F Ogura, T Otsubo

    CHEMISTRY OF MATERIALS　12　(8)　2196-2204　2000/08

    DOI： 10.1021/cm000117m 　

    ISSN： 0897-4756

  403. A flexible cyclophane: Design, synthesis, and structure of a multibridged tris-tetrathiafulvalene (TTF) macrocycle Peer-reviewed

    K Takimiya, N Thorup, J Becher

    CHEMISTRY-A EUROPEAN JOURNAL　6　(11)　1947-1954　2000/06

    DOI： 10.1002/1521-3765(20000602)6:11<1947::AID-CHEM1947>3.0.CO;2-1 　

    ISSN： 0947-6539

  404. Preparation and photoelectrochemical properties of gold electrodes modified with [60]fullerene-linked oligothiophenes Peer-reviewed

    D Hirayama, T Yamashiro, K Takimiya, Y Aso, T Otsubo, H Norieda, H Imahori, Y Sakata

    CHEMISTRY LETTERS　(5)　570-571　2000/05

    DOI： 10.1246/cl.2000.570 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  405. Spectroscopic study of isostructural charge-transfer salts: Non-metallic DMTTA-BF4 and metallic DMTSA-BF4 Peer-reviewed

    J Ouyang, J Dong, K Yakushi, K Takimiya, T Otsubo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　68　(11)　3708-3716　1999/11

    DOI： 10.1143/JPSJ.68.3708 　

    ISSN： 0031-9015

  406. Pyrrolo annelated tetrathiafulvalenes: The parent systems Peer-reviewed

    JO Jeppesen, K Takimiya, F Jensen, J Becher

    ORGANIC LETTERS　1　(8)　1291-1294　1999/10

    DOI： 10.1021/ol9902428 　

    ISSN： 1523-7060

  407. Structures and properties of (TMEO-ST-TTP)(2)AsF6 Peer-reviewed

    Y Misaki, M Taniguchi, K Tanaka, K Takimiya, A Morikami, T Otsubo, T Mori

    CHEMISTRY LETTERS　(9)　859-860　1999/09

    DOI： 10.1246/cl.1999.859 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  408. Triphenyleno[1,12-bcd : 4,5-b ' c ' d ': 8,9-b '' c '' d '']trithiophene: the first bowl-shaped heteroaromatic Peer-reviewed

    K Imamura, K Takimiya, Y Aso, T Otsubo

    CHEMICAL COMMUNICATIONS　(18)　1859-1860　1999/09

    DOI： 10.1039/a905860e 　

    ISSN： 1359-7345

  409. New stable metallic salt based on a donor molecule containing peri-ditellurium bridges, TMTTeN(SCN)(0.88) Peer-reviewed

    E Ojima, BZ Narymbetov, H Fujiwara, H Kobayashi, A Kobayashi, K Takimiya, T Otsubo, F Ogura

    CHEMISTRY LETTERS　(8)　845-846　1999/08

    DOI： 10.1246/cl.1999.845 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  410. Synthesis and properties of bitetraselenafulvalene Peer-reviewed

    M Iyoda, K Hara, CRV Rao, Y Kuwatani, K Takimiya, A Morikami, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　40　(31)　5729-5730　1999/07

    DOI： 10.1016/S0040-4039(99)01085-0 　

    ISSN： 0040-4039

  411. One-pot synthesis of heterocycle-fused 1,3-diselenole-2-selones as the key precursors of tetraselenafulvalene-type electron donors Peer-reviewed

    A Morikami, K Takimiya, Y Aso, T Otsubo

    ORGANIC LETTERS　1　(1)　23-25　1999/07

    DOI： 10.1021/ol990505y 　

    ISSN： 1523-7060

  412. Synthesis and properties of new PDT- and TPDT-TTP analogues Peer-reviewed

    T Kaibuki, Y Misaki, K Tanaka, K Takimiya, A Morikami, T Otsubo

    SYNTHETIC METALS　102　(1-3)　1621-1622　1999/06

    DOI： 10.1016/S0379-6779(98)00469-X 　

    ISSN： 0379-6779

  413. Metallic properties of 1 : 1 charge-transfer salt DMTSA-BF4 Peer-reviewed

    K Yakushi, J Dong, J Ouyang, K Takimiya, T Otsubo, H Tajima

    SYNTHETIC METALS　103　(1-3)　2208-2209　1999/06

    DOI： 10.1016/S0379-6779(98)00924-2 　

    ISSN： 0379-6779

  414. Structural feature of radical cation salts based on TTP and its selenium analogues Peer-reviewed

    Y Misaki, T Kochi, M Taniguchi, T Yamabe, K Tanaka, K Takimiya, A Morikami, T Otsubo, T Mori

    SYNTHETIC METALS　102　(1-3)　1675-1675　1999/06

    DOI： 10.1016/S0379-6779(98)00574-8 　

    ISSN： 0379-6779

  415. Three dimensional metals based on a tellurium-containing donors, TMTTeN and related conductors Peer-reviewed

    A Kobayashi, M Nakata, E Arai, H Fujiwara, H Kobayashi, K Takimiya, T Otsubo, F Ogura

    SYNTHETIC METALS　103　(1-3)　1865-1868　1999/06

    DOI： 10.1016/S0379-6779(98)00259-8 　

    ISSN： 0379-6779

  416. Conducting complexes of TTF and TSF derivatives fused with selenium-containing five-membered rings Peer-reviewed

    T Jigami, K Takimiya, Y Aso, T Otsubo

    SYNTHETIC METALS　102　(1-3)　1714-1715　1999/06

    DOI： 10.1016/S0379-6779(98)00890-X 　

    ISSN： 0379-6779

  417. Novel selenium variants of BEDT-TTF Peer-reviewed

    T Jigami, M Kawashima, K Takimiya, Y Aso, T Otsubo

    SYNTHETIC METALS　102　(1-3)　1619-1620　1999/06

    DOI： 10.1016/S0379-6779(98)00468-8 　

    ISSN： 0379-6779

  418. Alkylene- or alkylenedithio-linked dimeric tetraselenafulvalenes Peer-reviewed

    Y Aso, T Kageyama, M Kawashima, A Morikami, A Oharuda, K Takimiya, T Otsubo

    SYNTHETIC METALS　102　(1-3)　1605-1606　1999/06

    DOI： 10.1016/S0379-6779(98)00394-4 　

    ISSN： 0379-6779

  419. Synthesis and properties of methylthio substituted ST-TTP derivatives Peer-reviewed

    Y Misaki, T Kaibuki, T Monobe, K Tanaka, M Taniguchi, K Tanaka, T Yamabe, K Takimiya, A Morikami, T Otsubo, T Mori

    SYNTHETIC METALS　102　(1-3)　1781-1784　1999/06

    DOI： 10.1016/S0379-6779(98)00320-8 　

    ISSN： 0379-6779

  420. A novel tetrathiafulvalene building block Peer-reviewed

    JO Jeppesen, K Takimiya, N Thorup, J Becher

    SYNTHESIS-STUTTGART　(5)　803-810　1999/05

    DOI： 10.1055/s-1999-3473 　

    ISSN： 0039-7881

  421. Application of flash vacuum pyrolysis to the synthesis of sulfur-containing heteroaromatic systems Peer-reviewed

    K Imamura, D Hirayama, H Yoshimura, K Takimiya, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　40　(14)　2789-2792　1999/04

    DOI： 10.1016/S0040-4039(99)00295-6 　

    ISSN： 0040-4039

  422. Low-energy optical transitions in organic metal DMTSA-BF4 Peer-reviewed

    J Ouyang, K Yakushi, K Takimiya, T Otsubo, H Tajima

    SOLID STATE COMMUNICATIONS　110　(1)　63-68　1999

    DOI： 10.1016/S0038-1098(98)00610-3 　

    ISSN： 0038-1098

  423. Novel selenocycle-fused TTF-type of electron donors forming conducting molecular complexes: Bis(ethyleneseleno)tetrathiafulvalene (BES-TTF), diselenolotetrathiafulvalene (DS-TTF), and bis(ethyleneseleno)tetraselenafulvalene (BES-TSF) Peer-reviewed

    T Jigami, K Takimiya, T Otsubo, Y Aso

    JOURNAL OF ORGANIC CHEMISTRY　63　(24)　8865-8872　1998/11

    DOI： 10.1021/jo981024f 　

    ISSN： 0022-3263

  424. Syntheses and properties of 11,11,12,12-tetracyano-2,6-anthraquinodimethane (TANT) and its 9,10-dichloro derivative as novel extensive electron acceptors Peer-reviewed

    K Takimiya, T Yanagimoto, T Yamashiro, F Ogura, T Otsubo

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　71　(6)　1431-1435　1998/06

    DOI： 10.1246/bcsj.71.1431 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  425. Novel stable metallic salts based on a donor molecule containing peri-ditellurium bridges, TMTTeN Peer-reviewed

    E Arai, H Fujiwara, H Kobayashi, A Kobayashi, K Takimiya, T Otsubo, F Ogura

    INORGANIC CHEMISTRY　37　(12)　2850-2851　1998/06

    DOI： 10.1021/ic9802247 　

    ISSN： 0020-1669

  426. Developments of peri-dichalcogen-bridged fused aromatic hydrocarbons as novel electron donors forming conductive molecular complexes Peer-reviewed

    T Otsubo, K Takimiya, Y Aso

    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS　136　447-462　1998/05

    DOI： 10.1080/10426509808545972 　

    ISSN： 1042-6507

  427. Synthesis and characterization of the first double-bridged tetraselenafulvalenophanes Peer-reviewed

    K Takimiya, A Oharuda, A Morikami, Y Aso, T Otsubo

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　37　(5)　619-622　1998/03

    DOI： 10.1002/(SICI)1521-3773(19980316)37:5<619::AID-ANIE619>3.0.CO;2-T 　

    ISSN： 1433-7851

  428. Metallic properties of 1 : 1 charge-transfer salt, dimethyltetraselenoanthracene-tetrafluoroborate (DMTSA-BF4) Peer-reviewed

    J Dong, K Yakushi, K Takimiya, T Otsubo

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　67　(3)　971-977　1998/03

    DOI： 10.1143/JPSJ.67.971 　

    ISSN： 0031-9015

  429. New hybrid tetrachalcogenofulvalenes: diselenaditellurafulvalene and its dimethyl derivative Peer-reviewed

    K Takimiya, A Morikami, Y Aso, T Otsubo

    CHEMICAL COMMUNICATIONS　(19)　1925-1926　1997/10

    DOI： 10.1039/a704974i 　

    ISSN： 1359-7345

  430. Synthesis and properties of (propyleneditelluro)tetrathiafulvalene donors Peer-reviewed

    K Tsutsui, K Takimiya, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　38　(43)　7569-7572　1997/10

    DOI： 10.1016/S0040-4039(97)01784-X 　

    ISSN： 0040-4039

  431. Syntheses, unique strained molecular structures, and unusual transannular electronic interactions of a series of crisscross-overlapped tetrathiafulvalenophanes Peer-reviewed

    K Takimiya, K Imamura, Y Shibata, Y Aso, F Ogura, T Otsubo

    JOURNAL OF ORGANIC CHEMISTRY　62　(16)　5567-5574　1997/08

    DOI： 10.1021/jo962239x 　

    ISSN： 0022-3263

  432. An annulene TCNQ derivative with rather weak accentor properties Peer-reviewed

    RH Mitchell, Jin, X, T Otsubo, K Takimiya

    CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE　75　(6)　611-615　1997/06

    DOI： 10.1139/v97-072 　

    ISSN： 0008-4042

  433. Two isomeric triple-layered tetrathiafulvalenophanes: Syntheses, structures, and electrochemical properties Peer-reviewed

    S Yunoki, K Takimiya, Y Aso, T Otsubo

    TETRAHEDRON LETTERS　38　(17)　3017-3020　1997/04

    DOI： 10.1016/S0040-4039(97)00523-6 　

    ISSN： 0040-4039

  434. A convenient preparation of 1,3-dithiole-2-thione and 1,3-diselenole-2-selone derivatives Peer-reviewed

    K Takimiya, A Morikami, T Otsubo

    SYNLETT　(3)　319-&　1997/03

    ISSN： 0936-5214

  435. Crystal structures and electrical conductivities of cation-radical salts of a tellurium-containing donor: 3,4-dimethylanthra [1,9-cd:4,10-c'd']bis[1,2]-ditellurole Peer-reviewed

    M Nakata, A Kobayashi, T Saito, H Kobayashi, K Takimiya, T Otsubo, F Ogura

    CHEMICAL COMMUNICATIONS　(6)　593-594　1997/03

    DOI： 10.1039/a608589j 　

    ISSN： 1359-7345

  436. Synthesis and properties of trimethylenedithio-bridged tetrathiafulvalenophanes Peer-reviewed

    K Takimiya, Y Aso, T Otsubo

    SYNTHETIC METALS　86　(1-3)　1891-1892　1997/02

    DOI： 10.1016/S0379-6779(96)04640-1 　

    ISSN： 0379-6779

  437. Characterization of the half-filled DMTSA-BF4 by optical and magnetic measurements Peer-reviewed

    J Dong, K Yakushi, K Takimiya, T Otsubo

    SYNTHETIC METALS　84　(1-3)　633-634　1997/01

    DOI： 10.1016/S0379-6779(96)04083-0 　

    ISSN： 0379-6779

  438. Synthesis and properties of bis(ethyleneseleno)tetrathiafulvalene (BES-TTF) and diselenolotetrathiafulvalene (DS-TTF) as novel electron donors Peer-reviewed

    T Jigami, K Takimiya, Y Aso, T Otsubo

    CHEMISTRY LETTERS　(11)　1091-1092　1997

    DOI： 10.1246/cl.1997.1091 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  439. Highly conducting 1:1 radical cation salts: (DMTSA)X with X=NO3 and BF4 Peer-reviewed

    K Kawabata, M Yanai, T Sambongi, Y Aso, K Takimiya, T Otsubo

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS　296　197-204　1997

    DOI： 10.1080/10587259708032321 　

    ISSN： 1058-725X

  440. Electrochemical and spectroscopic properties of oligoselenophenes Peer-reviewed

    S Inoue, H Nakanishi, K Takimiya, Y Aso, T Otsubo

    SYNTHETIC METALS　84　(1-3)　341-342　1997/01

    DOI： 10.1016/S0379-6779(97)80772-2 　

    ISSN： 0379-6779

  441. Peri-dichalcogen bridged polycyclic aromatic hydrocarbons as novel electron donors for organic metals Peer-reviewed

    T Otsubo, K Takimiya

    REVIEWS ON HETEROATOM CHEMISTRY　16　69-84　1997

    ISSN： 0915-6151

  442. Designs and synthesis of novel electron donors of Non-TTF types and formation of their conducting molecular complexes Peer-reviewed

    T Otsubo, Y Aso, K Takimiya

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN　54　(9)　752-760　1996/09

    DOI： 10.5059/yukigoseikyokaishi.54.752 　

    ISSN： 0037-9980

  443. Electric and magnetic properties of a new conducting salt (DMTSA)(2)Cl (DMTSA=2,3-dimethyl-tetraselenoanthracene) Peer-reviewed

    M Yanai, K Kawabata, T Sambongi, Y Aso, K Takimiya, T Otsubo

    SYNTHETIC METALS　79　(2)　155-157　1996/05

    DOI： 10.1016/0379-6779(96)80184-6 　

    ISSN： 0379-6779

  444. Dimeric tetrathiafulvalenes: New electron donors Peer-reviewed

    T Otsubo, Y Aso, K Takimiya

    ADVANCED MATERIALS　8　(3)　203-&　1996/03

    DOI： 10.1002/adma.19960080303 　

    ISSN： 0935-9648

  445. SYNTHESES, STRUCTURES AND PROPERTIES OF PHENANTHRO[1,10-CD/8,9-C'D']BIS[1,2]-DITHIOLE AND PHENANTHRO[1,10-CD/8,9-C'D']BIS[1,2]-DISELENOLE AND THEIR METHYL AND METHYLTHIO DERIVATIVES AS NOVEL ELECTRON-DONORS Peer-reviewed

    K TAKIMIYA, Y SHIBATA, A OHNISHI, Y ASO, T OTSUBO, F OGURA

    JOURNAL OF MATERIALS CHEMISTRY　5　(10)　1539-1547　1995/10

    DOI： 10.1039/jm9950501539 　

    ISSN： 0959-9428

  446. DOUBLE-BRIDGED TETRATHIAFULVALENOPHANES AS NOVEL ELECTRON-DONORS - SYNTHESES, STRUCTURES, AND PROPERTIES OF 3 STRUCTURAL ISOMERS Peer-reviewed

    K TAKIMIYA, Y ASO, F OGURA, T OTSUBO

    CHEMISTRY LETTERS　(8)　735-736　1995/08

    DOI： 10.1246/cl.1995.735 　

    ISSN： 0366-7022

  447. DOUBLE-LAYERED TETRATHIAFULVALENE AS A NOVEL ELECTRON-DONOR Peer-reviewed

    K MATSUO, K TAKIMIYA, Y ASO, T OTSUBO, F OGURA

    CHEMISTRY LETTERS　(7)　523-524　1995/07

    DOI： 10.1246/cl.1995.523 　

    ISSN： 0366-7022

  448. CRISSCROSS-OVERLAPPED TETRATHIAFULVALENOPHANES Peer-reviewed

    K TAKIMIYA, Y SHIBATA, K IMAMURA, A KASHIHARA, Y ASO, T OTSUBO, F OGURA

    TETRAHEDRON LETTERS　36　(28)　5045-5048　1995/07

    DOI： 10.1016/0040-4039(95)00919-4 　

    ISSN： 0040-4039

  449. HIGHLY CONDUCTIVE 1/1 RADICAL-CATION SALTS OF ANTHRA[1,9-CD 4,10-C'D']BIS[1,2]DICHALCOGENOLES Peer-reviewed

    K TAKIMIYA, A OHNISHI, Y ASO, T OTSUBO, F OGURA, K KAWABATA, K TANAKA, M MIZUTANI

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　67　(3)　766-772　1994/03

    ISSN： 0009-2673

    eISSN： 1348-0634

  450. PYRANYLIDENEMETHYL-SUBSTITUTED AND THIOPYRANYLIDENEMETHYL-SUBSTITUTED FURANS, THIOPHENES, AND N-METHYLPYRROLES AS PRECURSORS OF ORGANIC METALS AND 3RD-ORDER NONLINEAR-OPTICAL MATERIALS Peer-reviewed

    K TAKIMIYA, T OTSUBO, F OGURA, H ASHITAKA, K MORITA, T SUEHIRO

    CHEMISTRY LETTERS　(2)　255-258　1994/02

    ISSN： 0366-7022

    eISSN： 1348-0715

  451. PHENANTHRO[1,10-CD-8,9-C'D']BIS[1,2]-DITHIOLE AND PHENANTHRO[1,10-CD-8,9-C'D']BIS[1,2]-DISELENOLE AS NOVEL ELECTRON-DONORS Peer-reviewed

    K TAKIMIYA, A OHNISHI, Y ASO, T OTSUBO, F OGURA

    JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS　(3)　278-280　1992/02

    ISSN： 0022-4936

  452. DIMETHYL AND TETRAMETHYL DERIVATIVES OF ANTHRA[1,9-CD-4,10-C'D']-BIS[1,2]DICHALCOGENOLES AND NAPHTHACENO[5,6-CD-11,12-C'D']-BIS[1,2]DICHALCOGENOLES Peer-reviewed

    H MIYAMOTO, K TAKIMIYA, Y ASO, T OTSUBO, F OGURA

    SYNTHETIC METALS　42　(3)　2389-2392　1991/05

    DOI： 10.1016/0379-6779(91)91388-Q 　

    ISSN： 0379-6779

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    尾坂格, 尾坂格, VOHRA Varun, 川島和彰, 川島和彰, 加々良剛志, 小金澤智之, 村田英幸, 瀧宮和男, 瀧宮和男

    基礎有機化学討論会要旨集　25th　2014

  16. ナフトビスチアジアゾール系ポリマーを用いた高効率有機薄膜太陽電池

    尾坂格, 尾坂格, VOHRA Varun, 川島和彰, 川島和彰, 加々良剛志, 小金澤智之, 瀧宮和男, 瀧宮和男, 村田英幸

    高分子学会予稿集(CD-ROM)　63　(2)　2014

  17. PNTz4Tを用いた逆構造太陽電池

    尾坂格, 尾坂格, VOHRA Varun, 川島和彰, 川島和彰, 加々良剛志, 小金澤智之, 村田英幸, 瀧宮和男, 瀧宮和男

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　75th　2014

  18. Low voltage operation of top-gate C_8-BTBT FETs using embedded electrodes

    Kimura Yu, Nagase Takashi, Kobayashi Takashi, Takimiya Kazuo, Ikeda Masaaki, Naito Hiroyoshi

    Technical report of IEICE. OME　113　(243)　1-5　2013/10/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    Top-gate organic FETs with embedded source-drain electrodes using a printable organic semiconductor, 2,7-dioctyl benzothieno [3,2-b] benzothiophene (C_8-BTBT), have been fabricated. The top-gate C_8-BTBT FETs with embedded electrodes show better electrical performance, better stability and higher mobilities (4.9cm^2/Vs) in comparison with those of the top-gate FETs with a conventional electrode configuration. We have demonstrated low voltage operation of the C_8-BTBT FETs with excellent electrical properties using embedded electrodes.

  19. 28pXT-2 Development of Functional Organic Semiconductors

    Takimiya Kazuo

    Meeting abstracts of the Physical Society of Japan　68　(1)　954-954　2013/03/26

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  20. 塗布型有機トランジスタのキャリア輸送機構:ホッピング輸送の影響に関する考察

    岡田純, 永瀬隆, 永瀬隆, 小林隆史, 小林隆史, 瀧宮和男, 池田征明, 内藤裕義, 内藤裕義

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　74th　2013

    ISSN： 2436-7613

  21. 埋め込み電極による塗布型有機電界効果トランジスタの低電圧駆動化

    木村友, 永瀬隆, 永瀬隆, 小林隆史, 小林隆史, 瀧宮和男, 池田征明, 内藤裕義, 内藤裕義

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　74th　2013

    ISSN： 2436-7613

  22. Low voltage operation of organic field-effect transistors with embedded electrodes

    Yu Kimura, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    Proceedings of the International Display Workshops　1　443-446　2013/01/01

    ISSN： 1883-2490

  23. Device performance of benzothienobenzothiophene-based top-gate organic field-effect transistors with embedded electrodes

    Yu Kimura, Fumio Mochizuki, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    Proceedings of the International Display Workshops　1　401-404　2012/12/01

    ISSN： 1883-2490

  24. Effect of hole-injection layer on top-gate organic field-effect transistors based on soluble benzothienobenzothiophene derivatives

    Fumio Mochizuki, Yosuke Miyata, Takashi Nagase, Takashi Kobayashi, Kazuo Takimiya, Masaaki Ikeda, Hiroyoshi Naito

    Proceedings of the International Display Workshops　2　1022-1025　2012/12/01

    ISSN： 1883-2490

  25. 20aHA-3 ESR observation of charge carrier dynamics in high-mobility organic semiconductor C_8-BTBT

    Tanaka H., Hasegawa H., Kinoshita Y., Kozuka M., Watanabe S., Ito H., Kuroda S., Shimoi Y., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　67　(2)　786-786　2012/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  26. 26pCC-3 Field-induced ESR measurements of charge carriers in high-mobility field-effect transistors of C_8-BTBT

    Tanaka H., Kozuka M., Watanabe S., Ito H., Kuroda S., Shimoi Y., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　67　(1)　911-911　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  27. 26pCC-5 Field-Induced ESR of Naphthodithiophene Copolymer OTFTs

    Matsui H., Ikawa M., Osaka I., Abe T., Takimiya K., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan　67　(1)　911-911　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  28. 24pCF-2 Carrier transport and crystal structure of highly-pressurized DNTT single crystal

    Sakai K., Okada Y., Kitaoka S., Miwa K., Uemura T., Ohishi Y., Takimiya K., Takeya J.

    Meeting abstracts of the Physical Society of Japan　67　(1)　879-879　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  29. 24pCF-6 Gated four-probe measurements in field-effect transistors of C_8-BTBT

    Yamada Y., Kozuka M., Nozaki T., Ito H., Watanabe S., Tanaka H., Kuroda S., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　67　(1)　880-880　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  30. New Insights into High-Performance, Soluble Organic Semiconductors : Reconsideration of Structure-Property Relationship

    75　(1)　82-85　2012/02

    Publisher: 日本写真学会

    ISSN： 0369-5662

  31. New Crystals and New Materials : Development of High Performance Organic Semiconductors Based on Thienoacenes

    47　(2)　89-96　2012/02

    Publisher: アグネ技術センター

    ISSN： 0454-4544

  32. Low Operation Voltage Organic Transistors on Shape-Memory Film with Planarization

    Kato Yu, Sekitani Tsuyoshi, Yokota Tomoyuki, Kuribara Kazunori, Zschieschang Ute, Klauk Hagen, Yamamoto Tatsuya, Takimiya Kazuo, Ikeda Masaaki, Kuwabara Hirokazu, Someya Takao

    Technical report of IEICE. OME　111　(369)　23-28　2011/12/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    We fabricated low operation voltage organic transistors on shape-memory film which memorizes its shape by applying heat more than 150℃ and can be applied to elastic circuits. Although this film had a problem of rough surface with RMS roughness of as large as 190nm, we obtained p-type organic transistors with mobility of 0.51 cm^2/Vs and organic CMOS inverters with gain of 92 by forming a polyimide planarization layer. Furthermore, we obtained p-type transistors with mobility of 1.8 cm^2/Vs by adding a parylene planarization layer and using anodization process of gate electrodes.

  33. チエノアセン系有機半導体材料における構造物性相関

    品村 祥司, 瀧宮 和男

    Molecular electronics and bioelectronics　22　(4)　209-216　2011/11/24

  34. 21pTD-3 Minute impurity analysis in DNTT thin-film transistors with use of field-induced GSR spectroscopy

    Takahashi E., Matsui H., Takimiya K., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan　66　(2)　843-843　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  35. 21pTD-4 Separation of intra- and interdomain carrier dynamics in organic TFTs II

    Matsui H., Kumaki D., Takahashi E., Takimiya K., Tokito S., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan　66　(2)　843-843　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  36. 22pTG-5 Pressure effect of charge transport properties on DNTT-FETs

    Sakai K., Okada Y., Kitaoka S., Miwa K., Uemura T., Takimiya K., Takeya J.

    Meeting abstracts of the Physical Society of Japan　66　(2)　870-870　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  37. 22pTG-7 Field-induced ESR measurements of charge carriers in high-mobility field-effect transistors of C_8-BTBT performed at low temperatures

    Tanaka H., Kozuka M., Watanabe S., Ito H., Kuroda S., Shimoi Y., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　66　(2)　870-870　2011/08/24

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  38. WANTS-NEEDS-SEEDS 3次元有機トランジスタ--縦型チャネルの集積化による有機トランジスタの高性能化

    宇野 真由美, 瀧宮 和男, 竹谷 純一

    未来材料　11　(8)　51-54　2011/08

    Publisher: エヌ・ティー・エス

    ISSN： 1346-0986

  39. Development trend of efficient semiconductor polymer for printable electronics

    17　(4)　1-7　2011/04

    Publisher: テクノタイムズ社

    ISSN： 1341-3961

  40. 28aTN-7 Spectrum simulation of ESR signals of charge carriers in field-effect transistors of C_8-BTBT

    Kuroda S., Kozuka M., Watanabe S., Tanaka H., Ito H., Shimoi Y., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　66　(1)　892-892　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  41. 28pTN-5 Separation of intra- and interdomain carrier dynamics in organic TFTs

    Matsui H., Takahashi E., Kumaki D., Tokito S., Takimiya K., Mishchenko Andrei S., Hasegawa T.

    Meeting abstracts of the Physical Society of Japan　66　(1)　899-899　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  42. 23pRL-2 ESR Analysis of High-Mobility Organic Semiconducting Molecules

    Takahashi Eiji, Matsui Hiroyuki, Takimiya Kazuo, Hasegawa Tatsuo

    Meeting abstracts of the Physical Society of Japan　65　(2)　785-785　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  43. 23pRL-7 ESR observations of field-induced charge carriers in high-mobility molecular material C_8-BTBT

    Kozuka M., Watanabe S., Tanaka H., Ito H., Kuroda S., Shimoi Y., Takimiya K.

    Meeting abstracts of the Physical Society of Japan　65　(2)　786-786　2010/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  44. Temperature dependence and air-stability of DNTT transistors using self-assembled-monolayer insulator

    UCHIYAMA Naoya, SEKITANI Tsuyoshi, YAMAMOTO Tatsuya, TAKIMIYA Kazuo, SOMEYA Takao, ZSCHIESCHANG Ute, KLAUK Hagen

    IEICE technical report　109　(359)　27-31　2010/01/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    We have fabricated organic field-effect transistors using high-performance organic semiconductor, dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) on self-assembled-monolayer, which can be operated 3 V or less. Their mobility was 1.8 cm^2/Vs and the leakage current was kept under 1 nA at low operating voltage of 3 V, and on/off ratio exceeded 10^5. Transistor performances were not changed even under exposing to air and heat cycles; they didn't deteriorate after 180 days stored in air and were functional at high temperatures up to 150℃ in nitrogen.

  45. 高移動度塗布型有機トランジスタの作製と塗布膜の結晶性評価

    添田淳史, 山岸正和, 植村隆文, 広瀬友里, 宇野真由美, 中尾朗子, 瀧宮和男, 竹谷純一

    応用物理学関係連合講演会講演予稿集(CD-ROM)　57th　2010

  46. 21pGS-4 Hall Effect of Solution-Processed Dioctylbenzothienobenzothiophene Crystalline Films

    Yamagishi M, Takeya J, Takatsuki Y, Soeda J, Okada Y, Hirose Y, Uemura T, Nanba N, Shinamura S, Takimiya K

    Meeting Abstracts of the Physical Society of Japan　65　(0)　888-888　2010

    Publisher: The Physical Society of Japan

    ISSN： 1342-8349

  47. 24pRL-10 Solution-processed single crystal of organic semiconductor and High mobility in the crystal

    Soeda J, Yamagishi M, Uemura T, Hirose Y, Uno M, Nakazawa Y, Nakao A, Takimiya K, Takeya J

    Meeting Abstracts of the Physical Society of Japan　65　(0)　807-807　2010

    Publisher: The Physical Society of Japan

    ISSN： 1342-8349

  48. Organic Semiconductors for Organic Field-Effect Transistors

    TAKIMIYA Kazuo

    Journal of the Japanese Liquid Crystal Society　13　(1)　42-48　2009/01/25

    Publisher: 日本液晶学会事務局

    ISSN： 1880-6449

  49. 27pYD-7 Hall effect in dinaphthothienothiophene thin-film transistors

    Yamagishi M, Okada Y, Soeda J, Uemura T, Nishikawa T, Doi I, Takimiya K, Takeya J

    Meeting Abstracts of the Physical Society of Japan　64　(0)　779-779　2009

    Publisher: The Physical Society of Japan

    ISSN： 1342-8349

  50. Synthesis and characterization of new organic semiconductors

    59　(2)　128-132　2008/02

    Publisher: 化学工業社

    ISSN： 0451-2014

  51. Antiferromagnetic ordering of the incommensurate organic superconductor (MDT-TS)(AuI_2_)_0.441_ with a high spin-flop field

    Tadashi Kawamoto, Yoshimasa Bando, Takehiko Mori, Takako Konoike, Yamaguchi Takahide, Taichi Terashima, Shinya Uji, Kazuo Takimiya, Tetsuo Otsubo

    Phys. Rev. B　77　(22)　224506　2008

    DOI： 10.1103/PhysRevB.77.224506 　

    ISSN： 1098-0121

  52. 含複素縮合多環芳香族化合物を用いた有機FET

    瀧宮 和男, 山本 達也

    未来材料　7　(9)　34-39　2007/09

    Publisher: エヌ・ティー・エス

    ISSN： 1346-0986

  53. 21aRA-4 Giant non-linear conductivity and spontaneous oscillation phenomena of the incommensurate organic superconductor : (MDT-TS)(AuI_2)_<0.441>

    Bando Y., Niizeki S., Oozawa T., Kawamoto T., Mori T., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　62　(2)　843-843　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  54. 22pRA-2 Design and synthesis of new organic semiconductors for OFET devices

    Takimiya Kazuo

    Meeting abstracts of the Physical Society of Japan　62　(2)　870-870　2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  55. 25pYF-10 Nonlinear Conductance in an Incommensurate Conductor MDT-TS

    Mori T., Bando Y., Kawamoto T., Terasaki I., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　61　(2)　699-699　2006/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  56. 新規電界発光(EL)材料として嵩高いテルフェニルピリジン,トリチルフェニルピリジンおよびテルチエニルピリジンをリガンドとするイリジウム錯体

    大坪 徹夫, 本田 千恵, 瀧宮 和男

    高分子加工　55　(5)　193-197　2006/05

    Publisher: 高分子刊行会

    ISSN： 0023-2564

  57. 30pRB-1 Ground state of the incommensurate organic conductor (MDT-TS)(AuI_2)_<0.441>

    Kawamoto T., Mori T., Yamaguchi T., Konoike T., Terashima T., Uji S., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　61　(1)　853-853　2006/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  58. 30pRB-2 Electrical properties of the organic superconductor with an incommensurate lattice (MDT-TS)I_xBr_y

    Bando Y., Kawamoto T., Mori T., Kakiuchi T., Sawa H., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　61　(1)　854-854　2006/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  59. Charge Transfer Degree and Superconductivity of the Incommensurate Organic Superconductor (MDT-TSF)(I_3_)_0.422_

    T. Kawamoto, T. Mori, T. Konoike, K, Enomoto T, Terashima S. Uji, K. Takimiya, T. Otsubo

    Phys. Rev. B　73　(9)　094513　2006

    DOI： 10.1103/PhysRevB.73.094513 　

    ISSN： 1098-0121

  60. 21pWB-4 Structural and transport properties of the incommensurate organic conductor (MDT-TS)(I_3)_<0.407>

    Kawamoto T., Endo H., Bando Y., Mori T., Kakiuchi T., Wakabayashi Y., Sawa H., Kitagawa H., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　60　(2)　705-705　2005/08/19

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  61. 24pYK-11 Properties under uniaxial strain in (MDT-TS)(Aul_2)_<0.441>

    Bando Y., Kawamoto T., Mori T., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　60　(1)　782-782　2005/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  62. 27pYL-8 Crystal structure and physical properties of (EDT-TSF)_2X(X=GaCl_4, FeCl_4)

    Endo H., Kawamoto T., Mori T., Kodani M., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　60　(1)　825-825　2005/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  63. 27pYL-6 Structural modulation of the incommensurate organic superconductor (MDT-TS)(AuI_2)_<0.441>

    Kawamoto T., Endo H., Bando Y., Mori T., Kakiuchi T., Wakabayashi Y., Sawa H., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　60　(1)　825-825　2005/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  64. 25aXP-3 Ultrafast spectroscopy on oligothiophene

    Ozawa A., Sakamoto K., Takimiya K., Otsubo T., Kobayashi T.

    Meeting abstracts of the Physical Society of Japan　60　(1)　690-690　2005/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  65. 14aTM-2 Fermi surface topology of the incommensurate organic superconductor (MDT-TSF)(I_3)_<0.422>

    Kawamoto T., Mori T., Enomoto K., Konoike T., Terashima T., Uji S., Kitagawa H., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　59　(2)　763-763　2004/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  66. 28pWL-12 Crystal structure and electronic states of the incommensurate organic superconductor with polyiodide chains : (MDT-ST)(I_3)_<0.417>

    Kawamoto T., Mori T., Enomoto K., Konoike T., Terashima T., Uji S., Yamaura J., Kitagawa H., Takamori A., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　59　(1)　852-852　2004/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  67. 28pWL-11 New organic superconductor with an incommensurate lattice : (MDT-TS)(AuI_2)_<0.441>

    Bando Y., Kawamoto T., Mori T., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　59　(1)　852-852　2004/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  68. 次世代エレクトロニクス素子に向けた ナノ共役分子の開発と機能

    大坪 徹夫, 瀧宮 和男

    未来材料　3　(12)　14-20　2003/12

    Publisher: エヌ・ティー・エス

    ISSN： 1346-0986

  69. Low-Temperature Heat Capacity of Organic Superconductor : (MDT-TTF)_2(AuI_2), (MDT-TSF)(AuI_2)_<0.436>

    Ishikawa T., Nakazawa Y., Oguni M., Saito K., Takimiya K., Ohtsubo T.

    Meeting abstracts of the Physical Society of Japan　58　(2)　721-721　2003/08/15

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  70. Superconducting properties of the incommensurate organic superconductor with polyiodide chains : (MDT-ST) (I_3)_<0.423>

    Kawamoto T., Mori T., Terashima T., Uji S., Takamori A., Takimiya K., Aso Y., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　58　(1)　780-780　2003/03/06

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  71. Fermi surface of the organic superconductor with an incommensurate anion potential (MDT-TSF)(AuI_2)_<0.436>

    Kawamoto T., Mori T., Terakura C., Terashima T., Uji S., Tajima H., Takimiya K., Aso Y., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　57　(2)　684-684　2002/08/13

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  72. Charge transfer degree control over T_c in the carrier doping type organic superconductors based on MDT-TSF.

    Kawamoto T., Mori T., Kitagawa H., Takimiya K., Aso Y., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　57　(2)　684-684　2002/08/13

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  73. 25pXM-12 Conduction electrons feeling the incommensurate anion potential

    Kawamoto T., Mori T., Terakura C., Uji S., Takimiya K., Kataoka Y., Aso Y., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　57　(1)　783-783　2002/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  74. Structure and upper critical field of organic superconductor (MDT-TSF)(AuI_2)_<0.436> with an incommensurate anion structure

    Kawamoto T., Mori T., Takimiya K., Kataoka Y., Aso Y., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　56　(2)　675-675　2001/09/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  75. New orgnic superconductors (MDT-TSF)_2X : possessing uniform donor stacs

    Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　56　(1)　741-741　2001/03/09

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  76. 新しい有機超伝導体の開発（合成の観点から）

    56　(6)　35-36　2001

  77. Structure, composition, and high-pressure resistance of DMTSA-BF_4

    Yakushi K., Simonyan M., Nakano C., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　55　(1)　710-710　2000/03/10

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  78. Crystal Structure and High Pressure Conductivity of β_<42>-type BEDT-TTF and BEDT-STF salts

    Mori H., Okano T., Kamiya M., Tanaka S., Tamura M., Nishio Y., Kajita K., Kodani M., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　55　(1)　731-731　2000/03/10

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  79. 31p-XB-10 Electronic structure of DMTTA-BF-4 isostructural to DMTSA-BF_4

    Yakushi K., Ouyang J., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　54　(1)　275-275　1999/03/15

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  80. 31p-XB-9 Photoemission study of DMTSA-BF_4

    Haruyama Y., Kinoshita T., Takimiya K., Otsubo T., Nakano C., Yakushi K.

    Meeting abstracts of the Physical Society of Japan　54　(1)　275-275　1999/03/15

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  81. 31p-XB-8 Temperature dependence of the spin susceptibility in DMTSA-BF_4

    Namba A., Kambe T., Nogami Y., Oshima K., Yakushi K., Dong J., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　54　(1)　275-275　1999/03/15

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  82. Phase transition and clectronic structure DMTSA-BF_4

    YAKUSHI K., OUYANG J., TAKIMIYA K., OTSUBO T.

    Meeting abstracts of the Physical Society of Japan　53　(2)　303-303　1998/09/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  83. Band structure and on-site Coulomb energy of metallic(1:1)charge-transfer salt DMTSA-BF_4

    YAKUSHI K., OUYANG J., TAKIMIYA K., OTSUBO T., TAJIMA H.

    Meeting abstracts of the Physical Society of Japan　53　(1)　230-230　1998/03/10

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  84. 6a-C-1 Solid state properties of metallic charge-transfer salt DMTSA-BF_4 having a half-filled band

    Yakushi K., Dong J., Takimiya K., Otsubo T.

    Meeting abstracts of the Physical Society of Japan　52　(2)　275-275　1997/09/16

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  85. Metallic conduction under high pressures and magnetic properties of 1:1 salt(DMTSA)BF_4

    Yanai M., Kawabata K., Sambongi T., Ohtsubo T., Takimiya K., Aso Y.

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1996　(2)　427-427　1996/09/13

    Publisher: The Physical Society of Japan (JPS)

  86. ＴＴＦ含む超分子化合物

    大坪 徹夫, 滝宮 和男

    化学　51　(10)　666-667　1996

    Publisher: 化学同人

    ISSN： 0451-1964

  87. 29a-K-1 Electrical and magnetic properties of highly conductive 1:1 radical cation salt(DMTSA)BF_4

    Yanai M, Kawabata K, Sambongi T, Ohtsubo T, Takimiya K, Aso Y

    Abstracts of the meeting of the Physical Society of Japan. Sectional meeting　1995　(2)　387-387　1995/09/12

    Publisher: The Physical Society of Japan (JPS)

  88. Electric properties of conducting organic complexes (DMTSA)X;(X=BF / NO3)

    Yanai M, Kawabata K, Takimiya K, Ohtsubo T, Ogura F, Sambongi T

    Abstracts of the meeting of the Physical Society of Japan. Annual meeting　50　(2)　414-414　1995/03/16

    Publisher: The Physical Society of Japan (JPS)

  89. 11.11.12.12-Tetracyano-2,6-anthraquinodimethane (TANT) as a Novel Extensive Electron Acceptor

    YANAGIMOTO T, TAKIMIYA K, OTSUBO T, OGURA F

    J. Chem. Soc., Chem. Commun.　(6)　519-520　1994

    DOI： 10.1039/c39930000519 　

    ISSN： 0022-4936

  90. Napththo[1,8-bc:5,4-b'c']dithiophene: a New Heteroarene Isoelectronic with Pyrene

    TAKIMIYA K, OTSUBO T, OGURA F

    J. Chem. Soc., Chem. Commun.　(16)　1859-1860　1994

    DOI： 10.1039/c39940001859 　

    ISSN： 0022-4936

  91. FACILE PREPARATION AND CHARGE-TRANSFER COMPLEXES OF NAPHTHO[1,8-BC/4,5-B'C']DITHIOPHENE AND 2,5-DIMETHYL AND BIS(METHYLTHIO) DERIVATIVES

    K TAKIMIYA, F YASHIKI, Y ASO, T OTSUBO, F OGURA

    CHEMISTRY LETTERS　(2)　365-368　1993/02

    DOI： 10.1246/cl.1993.365 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  92. SYNTHESES AND PROPERTIES OF DIMETHYL AND TETRAMETHYL ANTHRA[1,9-CD-4,10-C'D']-BIS[1,2]DICHALCOGENOLES AND THEIR CHARGE-TRANSFER COMPLEXES

    K TAKIMIYA, Y ASO, T OTSUBO, F OGURA

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN　64　(7)　2091-2102　1991/07

    DOI： 10.1246/bcsj.64.2091 　

    ISSN： 0009-2673

    eISSN： 1348-0634

  93. 2,3-Dimethyl and 2,3,6,7-Tetramethyl Derivatives of Anthra[1,9-cd:4,10-c'd']-bis[1,2]dichalcogenoles as New Electron Donor

    Kazuo Takimiya, Hisakazu Miyamoto, Yoshio Aso, Tetsuo Otsubo, Fumio Ogura

    Chem. Lett.　(4)　567-570　1991

    DOI： 10.1246/cl.1990.567 　

    ISSN： 0366-7022 1348-0715

  94. Highly Conductive 1 : 1 Radical Cation Salts of Anthra [1, 9-cd : 4, 10-c'd'] bis [1, 2] dichalcogenoles

    TAKIMIYA K, OHNISHI A, ASO Y, OTSUBO T, OGURA F, KAWABATA K, TANAKA K, MIZUTANI M

    Bulletin of Chemical Society of Japan　67　(3)　766-772　1974

    DOI： 10.1246/bcsj.67.766 　

    ISSN： 0009-2673 1348-0634

  95. Preparation of organic conductors in Organoselenium Chemistry, A Practical Approach

    Oxford University Press　257-277

Show all ︎Show first 5

Books and Other Publications 1

  1. 構造有機化学 : 基礎から物性へのアプローチまで

    中筋, 一弘, 久保, 孝史, 鈴木, 孝紀, 豊田, 真司

    東京化学同人　2020/01/10

    ISBN: 9784807909575

Presentations 14

  1. Crystal structures of molecular semiconductors: control and prediction Invited

    Kazuo Takimiya

    Horizons symposium: Electronic & energy materials　2023/09/26

  2. 分子性半導体の結晶構造：制御と予測 Invited

    瀧宮 和男, Kirill Bulugarevich

    第84回応用物理学会秋季学術講演会 T14 クロスオーバーシンポジウム 「有機エレクトロニクスの開拓と未来展望」　2023/09/21

  3. 結晶構造シミュレーションによる有機半導体開発の試み

    瀧宮和男, Kirill Bulugarevich, 堀内信吾

    第33回基礎有機化学討論会　2023/09/13

  4. Control of Crystal Structures of Molecular Semiconductors by Molecular Design

    ICMAT 2023, Symposium DD

    2023/06/26

  5. メチルチオ基による分子性半導体結晶の構造制御 Invited

    瀧宮和男

    高分子学会 超分子研究会 π共役系有機分子の合成・集合構造と機能　2023/05/12

  6. 「分子性固体」的観点からの有機半導体開発

    瀧宮 和男

    230323日本物理学会2023年春季大会シンポジウム 「バンド計算に基づく分子性固体の物質・材料設計」 （-機能物性開拓から物質設計・構造予測まで-）　2023/03/23

  7. 有機半導体固体の「設計と合成」： 高効率キャリア輸送のための結晶構造設計への挑戦

    瀧宮 和男

    日本学術振興会 産学連携第181委員会　2023/03/07

  8. チオフェン縮合ナフタレンジイミドの 材料化学 Invited

    瀧宮 和男

    東北大学金属材料研究所共同利用・共同研究ワークショップ 「多自由度・多階層性が協奏する物質材料システムの科学」　2017/12/05

  9. Materials Horizons Symposium: Electronic and Photonic Materials International-presentation Invited

    TAKIMIYA Kazuo

    Materials Horizons Symposium: Electronic and Photonic Materials　2017/11/17

  10. 合成化学で有機半導体を創る Invited

    瀧宮 和男

    第7回CSJ化学フェスタ　2017/10/17

  11. 複素芳香族化合物を基盤とした有機半導体材料の開発 Invited

    瀧宮 和男

    第11回分子科学討論会　2017/09/28

  12. Acenedithiophene quinoidals: syntheses and applications International-presentation Invited

    TAKIMIYA Kazuo

    2017/06/19

  13. Thiophene-fused Naphthalene diimides: Synthesis, Properties, and Applications to n-Type Organic Semiconductors International-presentation Invited

    TAKIMIYA Kazuo

    13th International Symposium on Functional π-Electron Systems (Fπ-13)　2017/06/05

  14. 含硫黄縮合多環芳香族を基盤とした有機半導体材料の開発 Invited

    瀧宮 和男

    ファインケミカルズ研究会　2017/05/10

Show all Show first 5

Research Projects 30

  1. ”結晶構造マニュピレーション”：ペリ縮合多環芳香族の高性能有機半導体化

    瀧宮 和男, 川畑 公輔

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 国立研究開発法人理化学研究所

    2023/04/01 - 2026/03/31

  2. Creation of aggregation-induced self-doped organic semiconductors

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Pioneering)

    Institution: Tohoku University

    2021/07/09 - 2025/03/31

  3. Condensed Conjugation Molecular Physics and Chemistry: Revisiting "Electronic Conjugation" Leading to Innovative Physical Properties of Molecular Materials

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: Kyoto University

    2020/11/19 - 2025/03/31

  4. Maximization of Intermolecular Interactions for Condensed Conjugation

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: Osaka University

    2020/11/19 - 2025/03/31

  5. Development of near-infrared organic semiconductors

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Institution: Tohoku University

    2019/10/07 - 2023/03/31

  6. Development of supramolecular organic semiconductors

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2019/04/01 - 2023/03/31

  7. Creation of Covalent Organic 2-Dimensional Materials

    Takimiya Kazuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Challenging Research (Exploratory)

    Category: Challenging Research (Exploratory)

    Institution: Tohoku University

    2019/06/28 - 2021/03/31

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    In this study, synthetic studies of a two-dimensional covalent structure that has a repeating structure of 2,3-dihydroxyphenylboronic acid units were carried out. The target compounds were completely unknown, and they are characterized by their densely packedπ-electron systems. The synthesis, purification, and identification of the cyclic tetramer, which is a "monomer" of the target two-dimensional covalent structure, were perfectly achieved, which gave us critical knowledges on the synthesis and structure of the ultimate target. With the knowledges, the synthesis of the two-dimensional covalent structure was attempted; the precursor of the target was successfully synthesized, and the synthetic trials by using the precursor were carried out. Unfortunately, the complete isolation and characterization were not achieved, but with the aid of theoretical calculations to simulate the structure and properties of the target, it can be concluded that the target is formed in the reaction.

  8. Rylene diimide-based n-type seidonducting polymers for thermoelectronic materials

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

    Category: Grant-in-Aid for JSPS Fellows

    Institution: Institute of Physical and Chemical Research

    2019/04/25 - 2021/03/31

  9. 界面の電子状態制御による革新的有機電子デバイスの開拓 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 二国間交流事業

    2017 - 2018

  10. 多階層制御による有機半導体材料の高機能化 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 基盤研究（A)

    2015 - 2018

  11. 新しい高性能ポリマー半導体材料と印刷プロセスによるAM-TFTを基盤とするフレキシブルディスプレイの開発 Competitive

    瀧宮 和男

    Offer Organization: JST

    System: 研究成果展開事業（S-イノベ ）

    2009 - 2018

  12. 有機半導体-酸化物界面の双極子制御による革新的デバイス Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 挑戦的萌芽研究

    2015 - 2016

  13. 未踏有機半導体骨格の探索と応用 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 基盤研究（A)

    2011 - 2014

  14. 自己組織化可能な可溶性低分子有機半導体の開発と溶液プロセス有機FETへの応用 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 基盤研究（B)

    2008 - 2010

  15. 可溶性両極有機半導体の開発と塗布プロセス有機CMOSへの応用

    瀧宮 和男

    System: 産学が連携した研究開発成果の展開 研究成果展開事業 地域事業 地域イノベーション創出総合支援事業 シーズ発掘試験

    Institution: 広島大学

    2009 - 2009

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    有機半導体技術の特徴の一つに塗布プロセス性の良さが挙げられるが、この他に単一の半導体材料でn型とp型の動作が可能な材料(両極性有機半導体)が開発できる点がある。これら二つの有機半導体ならではの特徴を活かすことを目的に、本研究では,材料のフロンティア軌道のエネルギーレベルと両極特性発現との相関を精査しつつ新しい可溶性両極有機半導体材料の開発を行い、さらに塗布プロセスの最適化によりCMOS(相補型金属酸化物半導体デバイス)への応用を行う。

  16. 次世代高性能有機半導体材料の開発

    瀧宮 和男

    System: 産学が連携した研究開発成果の展開 研究成果展開事業 地域事業 地域イノベーション創出総合支援事業 育成研究

    Institution: 広島大学

    2007 - 2009

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    有機半導体は次世代の薄膜トランジスタ(TFT)材料として期待されている。本研究では,高い特性と安定性を両立する希少な有機半導体材料であるジナフトチエノチオフェン(DNTT)の大量合成法とデバイス材料としての汎用性の検討を行い,実用化に向けた検討を行った。

  17. 可溶な両極性有機半導体を用いる塗布プロセスCMOSの開発

    瀧宮 和男

    System: 産学が連携した研究開発成果の展開 研究成果展開事業 地域事業 地域イノベーション創出総合支援事業 シーズ発掘試験

    Institution: 広島大学

    2008 - 2008

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    有機半導体の特徴は、塗布プロセスとの相性の良さの他に、単一の半導体材料でn型とp型の動作が可能な材料(両極性有機半導体)が開発できる点がある。これらの有機半導体の特徴を活かした材料開発と用途開発を目的とし、本研究では可溶性の両極性有機半導体の開発と、塗布プロセスを用いてCMOSインバータ等の理論回路形成へと応用展開を図る。塗布により簡便に製膜出来る両極性材料が開発できれば、例えば一つの基板上に二つの同一の電極の組を配置するだけでCMOSインバータなどの論理回路が形成でき、従来、極めて複雑な工程を経て作製されていたこれらの回路を簡便に作成できるようになると期待される。

  18. オリゴチエノキノイド分子を用いる純有機単一成分伝導体の開発 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 基盤研究（B)

    2006 - 2007

  19. Synthesis, Properties, and Applications of Functional Nano-Sized Conjugated Moleculas

    OTSUBO Tetsuo, HARIMA Yutaka, TAKIMIYA Kazuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Hiroshima University

    2005 - 2007

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    In order to develop novel nano-sized molecules showing distinguished functionalities, we focused on several new highly p-extended systems; they were carefully designed, selectively synthesized, and applied to various functional molecular-based devices such as photovoltaic cells, field-effect transistors, soluble organic semiconductors, light emitting diodes, molecular switches, functional dyes, and so on. Followings are major achievements in this project. 1. Highly efficient light-condensing molecules based on polphyradines possessing condensed thiophenes; the new polphyradine derivatives that have the same electronic structure with phthalocyanines were developed. They have high solubility and capability of self-organization in the solid state. 2. Application of long oligothiophenes to photovoltaic cells: oligothiophenes (tetramer, octamer, dodecamer) modified with a carbonic acid or a cyanopropanoic acid anchoring terminal were synthesized and tested as active dyes in the dye-sensitized solar cells (DSSCs). The DSSCs using the dodecamer modified with a cyanopropanoic acid anchor gave good photovoltaic conversion efficiency of 4.0% under the illumination of AM1.5 solar simulator. 3. Self-assembling, solution prosessible organic semiconductors for high performance OFETs; we found that combination of large, rigid, and planer n-conjugated structures with long alkyl chains can give highly soluble and self-assembling organic semiconductors. With this approach, solution-processed OFETs with field-effect mobility as high as 2.7 cm^2/Vs were achieved. 4. Functional dyes based on oligothionoquinoid molecules: dicyanomethylene-substituted oligothionoquinoids were successfully synthesized up to the hexamer. Depending on the length of the oligothionoquinoid chain, the absorption bands of the oligomers shift from UV (monomer) to near IR (tetramer) via visible regime (dimes and Mimes). Interestingly, pentamer and hexamer showed absorption bands in the visible regime again. These phenomena were experimentally and theoretically rationalized by incorporation of open-shell spices which have contribution of the "oligothiophene" structure rather than the "oligothionoquinoid" structure.

  20. ナノ分子導体の合成化学的アプローチ

    大坪 徹夫, 瀧宮 和男, 宮碕 栄吾

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 広島大学

    2003 - 2007

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    新規ナノ分子の薄膜デバイス化を検討し,特に有機薄膜トランジスタの材料開発とデバイス作製・評価を中心に研究を行った.その結果,主に以下の成果を得ることが出来た. 1.長鎖オリゴチオフェンの有機FET:従来から開発してきた単分散巨大分子である一連の鎖長を持つオリゴチオフェンを半導体層にもつ薄膜トランジスタを作製し,その特性を評価した.その結果,20量体以上の鎖長のもので良好なトランジスタ特性を示し,電界効果移動度は鎖長の伸長に伴い向上することが明らかとなった.また,薄膜中での分子の配向を調査するためXRDを測定したところ,ポリチオフェン薄膜に見られるようなラメラ構造が確認できた. 2.含ヘテロ縮合多環芳香族を用いた有機FET:チオフェンンを縮合芳香族中に組み込んだ新規化合物であるジフェニルベンゾチエノベンゾチオフェン(DPh-BTBT)とアルキルベンゾチエノベンゾチオフェン(R_2-BTBT)を開発し,それらを活性層に用いた有機FETを作製・評価した.これらの材料はポリアセン系材料とは大きく異なり,大気中でも極めて安定であった.さらに,この安定性のため,作製したトランジスタも大気中でも安定に駆動でき,また,電界効果移動度は最高で2.0cm^2/Vsに達することが明らかとなった.この移動度は,現在,世界最高レベルであるだけでなく,大気に対しても安定であることから有機FETの実用化に資する材料として注目される. 3.拡張含ヘテロ縮合多環芳香族の開発:上記の結果をうけ,さらにπ電子系を拡張したπ電子系であるジナフトチエノチオフェン(DNTT)を開発した.この化合物も期待通り,有機FETにおいて優れた半導体材料として作用し,その電界効果移動度は最高で3.0cm^2/Vsに達した.

  21. 含セレン縮合多環芳香族を基盤とした有機半導体トランジスタ材料の創製 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 若手研究(B)

    2004 - 2005

  22. Development of nano-scale conjugated molecular wires and research of their functional abilities

    OTSUBO Tetsuo, ASO Yoshio, TAKIMIYA Kazuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: HIROSHIMA UNIVERSITY

    2001 - 2004

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    In order to explore the potential of nano-scale conjugated oligomers as advanced functional materials, the following four projects have been studied : 1,the designs and developments of functional conjugated nanomolecules ; 2,multifunctionalization of conjugated nanomolecules ; 3,higher-order organization of conjugated nanomolecules ; 4,applications of conjugated nanomolecules as molecular electronics materials. The most fruitful research result in the first topic is to have developed a series of oligothiophenes up to the 96-mer with 36.7 nm in length. The development of such extraordinarily long molecules means the docking of the bottom-up of synthetic molecules with the downsizing of microtechnology. This is the first important step towards the realization of single-molecular electronics. A great result in the second topic is to have revealed the advantage of oligothiophenes as superior molecular wires for photoinduced electron and energy transfer. A marked result in the third topics is to have developed a tripodal tetraphenylmethane anchor, which can serve the self-standing of the attached oligothiophene molecules in a self-assembled monolayer(SAM) formed on the gold substrate. It was actually applied to the successful construction of highly efficient SAM-based photovoltaic cells and electroluminescent devices. In the fourth topics, remarkable is to observe that oligothiophene/fullerene dyads are superior systems apt to photoinduced charge-separation, which is applicable to molecular electronics materials. Plastic solar cells using the oligothiophene/fullerene dyads were fabricated, demonstrating efficient photovoltaic performances.

  23. 曲がった構造を有するヘテロ芳香族化合物の開発と機能探索

    大坪 徹夫, 瀧宮 和男, 安蘇 芳雄

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 広島大学

    2001 - 2002

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    芳香族炭化水素の一つであるコロネンは平面で、極めて対称性が高いことより、電子構造に非常に興味がもたれている。本研究では、ヘテロ原子の強い相互作用のため機能性が高まると期待されるコロネンのヘテロ類縁体に着目し、トリフェニレノトリチオフェンの合成を行った。この化合物の分子構造をX線構造解析で明らかにしたところ、驚いたことにボール型の構造をしており、フラーレンの曲面に近い構造をしていることが分かった。さらに、興味深いことに、この結晶構造は曲がったパイ系が凹凸相互作用で一方向に積み重なっており、結晶構造に反転対称が存在しないことが分かった。このことは結晶自身に自発分極が存在することを意味する。そのような分極結晶は焦電性や圧電性を示す可能性がある。そこで、この単結晶の焦電性の測定を検討した。雲母基盤上に単結晶を置き、金電極を取り付けて、20℃から50℃の温度変化に対応して発生する電極両端の電位差を測定した。その結果、1℃あたり0.1mVの電位が発生し、この値から焦電係数が17μCm^<-2>K^<-1>であると分かった。この値は標準的な有機焦電材料であるメタニトロアニリンの焦電係数9μCm^<-2>K^<-1>と比べてもかなり大きく、トリフェニレノトリチオフェンが優秀な焦電材料であることが明らかとなった。トリフェニレノトリチオフェンの縮合環の拡張体はより曲面が大きい分子を生じると期待され、このことより、さらに大きな自発分極を示す可能性がある。そごで、トリフェニレノトリチオフェンのトリベンゾ誘導体に研究対象を拡げ、その合成に成功し、構造解析や物性を検討中である。トリフェニレノトリチオフェンの大きな焦電性の発見はインパクトを与えると期待され、その結果の論文を作成中である。

  24. 新規含セレン電子供与体を用いる分子性超伝導体の開発 Competitive

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金 若手研究(B)

    2001 - 2002

  25. DEVELOPMENT OF LONG DISTANCE CARRIER-TRANSPORT SYSTEMS BASED ON THE SYNTHESIS OF EXTENSIVELY CONJUGATED SULFUR-CONTAINING HETEROARONIATICS

    ASO Yoshio, TAKIMIYA Kazuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: HIROSHIMA UNIVERSITY

    2000 - 2002

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    1. A series of extraordinarily long oligothiophenes up to the 96-mer has been developed by taking advantage of selective iterative couplings of the completely β-blocked sexithiophene at the terminal α-positions. Their spectroscopic measurements evidently indicate that they are highly conjugated like non-substituted oligothiophene and exhibit no convergent limit for the extended conjugation up to the 96-mer yet, which is much longer than that previously speculated for polythiophenes. 2. [60]Fullerene-linked quarter- and octi-thiophenes bearing a tripodal rigid anchor have been synthesized as components of highly efficient SAM-based photovoltaic cells. It has been demonstrated that the tripodal anchor plays an important role in preparing a well-organized SAM on a gold electrode, leading to marked enhancement of the photocurrent generation as compared to the reference system with a one-armed anchor. The highest quantum yield was estimated based on the number of absorbed photons to be 35% for the octithiophene-based cell. The remarkably large quantum yield indicates that the long oligotbiophene chain can facilitate the generation and charge transport of photocurrent. 3. Oligothiophene/fullerene dyads (nT-C60) are incorporated in photovoltaic cells, which demonstrate relatively high incident photon-to-current efficiency up to 9.7 %. The generation of high photocurrents is ascribable to the ready photoinduced charge separation of the dyads and a good oligothiophene network for hole transport. The monochromatic power conversion efficiency of the A1/16T-C60/Au device measured at 456 nm is 0.4%. 4. Ter- and quater-thiophenes bearing pyrenes at the terminal α or β positions have been synthesized as novel emitting materials in organic electroluminescence devices. The efficient single layer EL devices of these compounds are fabricated by use of an Al/ultrathin LiF bilayer cathode. One of them exhibits a maximum luminance of 1860 cd/m^2 and a luminous efficiency of 0.15 lm/W, which are of the highest performance class among single-organic-layer EL devices.

  26. Design and synthesis of nanosized conjugated π-electron molecules with specific functionarity

    OTSUBO Tetsuo, TAKIMIYA Kazuo, ASO Yoshio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Hiroshima University

    1998 - 2000

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    As one of the most promising approaches for the development of functional organic materials, nanosized conjugated oligomers are of current attention. However, only few number of well-defined nanomolecules with over 10 nm length readily manipulated by modern STM techniques have not been known. In this regard, this project has aimed at the development of extraordinarily long oligothiophenes, which correspond to monodisperse polymers. A series of oligothiophenes up to the 72-mer has been synthesized. The spectroscopic studies of the homologous series of the long oligothiophenes served to clarify the concept of an effective conjugation length of α-conjugated thiophene systems, which extends to 20-30 thiophene units. The doped-conductivity studies of these oligomers were also very helpful in elucidating the conduction mechanism of conductive polythiophenes : it turned out that the conductivities are also dependent on the conjugation length, and the effective conjugation length play a critical role in determining the charge transport of polythiophenes. In addition, the spectroscopic studies of the oxidized species led to an important conclusion that the active charge carrier species are both π-dimers and bipolarons. In an extension study, long oligothiophenes were used as a molecular wire allowing photoinduced electron- and/or energy-transfer from the donating porphyrin part to the accepting fullerene part. Furthermore, the molecular-wire behavior of sophisticated oligothiophenes was successfully applied to the oligothiophene-based photovoltaic devices.

  27. テトラチアフルバレンの積層化による新規電子供与体の開発

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 広島大学

    1996 - 1996

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    平面構造でかつ四カ所の結合可能な部位を有するテトラチアフルバレン(TTF)ユニットを分子内で積層するうえで,二架橋シクロファン型,四架橋並行型,及び四架橋交差型などの様式が考えられるが,本研究では二架橋シクロファン型を中心に(1)架橋鎖の異なるTTFファンの合成とラジカル塩作成,(2)三層TTFファンへの展開,(3)二架橋テトラセレナフルバレン(TSFファン)への拡張を検討した。 (1)に関しては,架橋鎖がメチレンジチオからテトラメチレンジオ基までのTTFファンの合成に成功し,TTFユニット間の相互作用をサイクリックボルタメトリ(CV),電子吸収スペクトル(UV)測定,及びX線構造解析により検討した。その結果,相互作用は架橋鎖長に大きく依存することが明らかとなり,架橋鎖が長くなると相互作用が弱くなる傾向が見られた。また,これらのうち,エチレンジチオ架橋体の電解酸化により,TTFファン系電子供与体で最初の金属的な伝導性挙動を示すラジカル塩が得られた。 一方,(2)についても,様々な合成ルートを検討した結果,最初の三層TTFファンの合成に成功し,その構造と物性を,CV,UV,及びX線構造解析により明らかにした。さらに,(3)については,比較的原料合成の容易なTTFファン系とは異なり,標的化合物の合成自体が極めて困難であることが予想されていたが,合成法を徹底的に検討した結果,アセチレン化合物を出発原料に用いる環化反応がこの系の化合物の合成に対して極めて有効であることが明らかとなった。実際,ジアセチレン化合物を用いることにより,ワンポットでTSFファンの直接の前駆体が良好な収率で得られ,さらに少量ではあるが,初の二架橋TSFファンの合成にも成功した。

  28. Development of Functional Materials Based on Ene-Yne Oligomers

    ASO Yoshio, TAKIMIYA Kazuo, OTSUBO Tetsuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: HIROSHIMA UNIVERSITY

    1995 - 1996

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    We have successfully synthesized 1,2-cyclopentenylene-ethynylene and 3,4-thienylene-ethynylene oligomers. The well-documented palladium-caralyzed coupling reaction of terminal alkynes and alkenyl or aryl halides was repeatedly applied to the synthesis of these oligomers, which were fully characterized by spectroscopic and elemental analyzes. Electronic absorption spectra of 1,2-cyclopentenylene-ethynylene oligomers showed bathochromic shifts with increasing chain length, indicating increasing conjugation of the pi-electrons. On the other hand, electronic spectra of 3,4-thienylene-ethynylene oligomers showed a characteristic pi-pi^<**> transition with almost identical absorption maximum, suggesting a favorable twist conformation of the thienyl-ethynyl moieties, which decreases conjugation of the pi-electrons. The solid-state conformations of 3,4-thienylene-ethynylene oligomers were elucidated by an X-ray crystallographic analysis, and they take a totally heilcal conformation. A detailed comparison of the ^1H NMR spectra of the oligomers revealed high-field shifts of the thienyl protons, supporting that the helical conformation with intramolecular stacking of the thiophene moieties also dominates in solution. A tandem cyclization reaction of the 1,2-cyclopentenylene-ethynylene system was induced at above 200ﾟC in a solution. Although the 3,4-thienylene-ethynylene systems were thermally stable, they were cyclized under the influence of tellurium tetrachloride to afford novel thiophene-fused pentalene system. These oligomers showed intense fluorescence in a visible region, suggesting potential materials as optoelectronic devices.

  29. 積層テトラチアフルバレン型電子供与体の合成研究

    瀧宮 和男

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 広島大学

    1995 - 1995

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    四ヵ所の結合可能部位を有する平面構造のテトラチアフルバレン(TTF)ユニットを積層的に二量化するうえで幾つかの様式が可能であるが、本年度に於いて、(1)二架橋シクロファン型、(2)四架橋平行型、及び(3)四架橋交差型積層TTF化合物の合成に成功した。これらの合成過程に於いて、テトラチアフルバレン誘導体の合成に広く用いられている中間体である亜鉛錯体を利用する合成法以外に、近年報告された、5-メトキシカルボニル-4-ルカプト-1,3-ジチオール-2-チオンが(1)の合成に対し特に有用である事が明らかとなった。 合成に成功した(1)-(3)のTTFユニット間相互作用をサイクリックボルタモメトリ(CV)、電子吸収スペクトル(UV)測定により検討したところ、(1)のCV測定においてTTF間に顕著な渡環相互作用が観測され、また、相互作用の大きさは架橋鎖長に依存することが明らかとなった。一方、(3)に於いては系統的に架橋鎖長を変化させることで、CV、UVに顕著な変化が観測され、架橋鎖の長さだけでなくコンフォメーションがTTFユニット間の相互作用に影響を及ぼすことが示唆された。また、(1)-(3)のX線構造解析を行い、架橋様式、架橋鎖長のTTF部の歪みの発生に対する影響を検討した。 (1)-(3)を用いた電荷移動塩の作成を電解結晶化法を中心に行い、(2)、(3)では半導体領域の伝導性塩が得られたのに対し、(1)のラジカルカチオン塩は高伝導性を示すことが明らかとなった。中でも、ヨウ素塩は積層TTF化合物に於ける最初の金属的挙動を示す塩であることが明らかとなった。また、(1)のラジカル塩の結晶構造解析から、結晶中で(1)はシート状の構造を作りやすい事が明らかとなった。これはドナー分子を二量化したことで、構成成分が直方体となり二次元的な構造を取り易くなったものと考えることができる。

  30. Synthetic research on a model compound of organic high-tenperature superconductors

    OTSUBO Tetsuo, TAKIMIYA Kazuo, ASO Yoshio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for General Scientific Research (B)

    Institution: HIROSHIMA UNIVERSITY

    1994 - 1995

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    Double-layred tetrathiafulvalenophanes consisting dimeric TTF units might be regarded as suitable model compounds for k-type of TTF complexes showing high-temperature superconductivities. In addition, they are interesting as potential electron donors, which have some advantages in the formation of charge-transfer complexes, e, g., possibilities of controlled stoichiometry and assembly. Many overlapped types of the two TTF units may be considered in the designs of such layred TTF phanes. In this regard, we have studied novel several tetrathiafulvalenophanes with different stacking modes, which include four double-bridged types (cis-cis) , (cis-trans) , (trans-trans, parallel) , and (trans-trans, twist) and two quadruple-bridged types (parallel) and (crisscross). They behaved as good electron donors forming conductive molecular complexes, some of which corresponded to organic metals

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