Published Papers

  • Furan Fused V-Shaped Organic Semiconducting Materials with High Emission and High Mobility
    K. Nakahara, C. Mitsui, T. Okamoto, M. Yamagishi, H. Matsui, T. Ueno, Y. Tanaka, M. Yano, T. Matsushita, J. Soeda, Y. Hirose, H. Sato, A. Yamano, and J. Takeya
    Chem. Commun., accepted.
    DOI: 10.1039/C3CC47577H
  • Structural investigation of ionic liquid/rubrene single crystal interfaces by using frequency-modulation atomic force microscopy
    Y. Yokota, H. Hara, T. Harada, A. Imanishi, T. Uemura, J. Takeya*, and K. Fukui*
    Chem. Commun. 49, 10596 (2013).
    DOI: 10.1039/C3CC45338C
  • Dinaphtho[1,2‑b:2′,1’‑d]chalcogenophenes: Comprehensive Investigation of the Effect of the Chalcogen Atoms in the Phenacene-Type π‑Electronic Cores
    C. Mitsui, T. Okamoto*, H. Matsui, M. Yamagishi, T. Matsushita, J. Soeda, K. Miwa, H. Sato, A. Yamano, T. Uemura, and J. Takeya*
    Chem. Mater. 25, 3952−3956 (2013).
    DOI: 10.1021/cm303376g
  • V-Shaped Organic Semiconductors With Solution Processability, High Mobility, and High Thermal Durability
    T. Okamoto*, C. Mitsui, M. Yamagishi, K. Nakahara, J. Soeda, Y. Hirose, K. Miwa, H. Sato, A. Yamano, T. Matsushita, T. Uemura, and J. Takeya*
    Adv. Mater. 25, 6392–6397 (2013).
    DOI: 10.1002/adma.201302086
  • Flexible air-stable three-dimensional polymer field-effect transistors with high output current density
    K. Nakayama, W. Ou-Yang*, M. Uno, I. Osaka, K. Takimiya, and J. Takeya*
    Organic Electron. 14, 2908–2915 (2013)
    DOI: 10.1016/j.orgel.2013.08.002
  • Inch-size solution-processed single-crystalline films of high-mobility organic semiconductors
    J. Soeda, T. Uemura, T. Okamoto*, C. Mitsui, M. Yamagishi, and J. Takeya*
    Appl. Phys. Express 6, 076503 (2013)
    DOI: 10.7567/APEX.6.076503
  • Doping of Organic Semiconductors: Impact of Dopant Strength and Electronic Coupling
    H. Méndez, G. Heimel*, A. Opitz, K. Sauer, P. Barkowski, M. Oehzelt, J. Soeda, T. Okamoto, J. Takeya, J. B. Arlin, J. Y. Balandier, Y. Geerts, N. Koch, and I. Salzmann*
    Angew. Chem. 125, 1–6 (2013)
    DOI: 10.1002/ange.201302396
  • High-performance solution-processed organic transistors with electroless-plated electrodes
    M. Ito, T. Uemura, J. Soeda, and J. Takeya*
    Organic Electron. 14, 2144-2147 (2013)
    DOI: 10.1016/j.orgel.2013.05.006
  • Investigation of Hole Transporting Properties in Thin-Film and Single-Crystal Organic Field-Effect Transistor Based on Dinaphtho[2,1-b:1′,2′-d]thiophene
    K. Nakahara, C. Mitsui, T. Okamoto*, M. Yamagishi, J. Soeda, K. Miwa, H. Sato, A. Yamano, T. Uemura, and J. Takeya*
    Jpn. J. Appl. Phys. 52, 05DC10 (2013)
    DOI: 10.7567/JJAP.52.05DC10
  • Single-Crystal Field-Effect Transistors with a Furan-Containing Organic Semiconductor Having a Twisted π-Electronic System
    K. Nakahara, C. Mitsui, T. Okamoto*, M. Yamagishi, K. Miwa, H. Sato, A. Yamano, T. Uemura, and J. Takeya*
    Chem. Lett. 42, 654-656 (2013)
    DOI: 10.1246/cl.130133
  • Retrieval of electronic spectra of charge carriers in organic field-effect transistors from charge modulation reflectance spectra distorted by optical interference
    K. Miyata, Y. Ishino, K. Watanabe, K. Miwa, T. Uemura, J. Takeya, and Y. Matsumoto*
    Jpn. J. Appl. Phys. 52, 062401 (2013)
    DOI: 10.7567/JJAP.52.062401
  • High-speed organic single-crystal transistors gated with short-channel air gaps: Efficient hole and electron injection in organic semiconductor crystals
    M. Uno*, T. Uemura, Y. Kanaoka, Z. Chen, A. Facchetti, and J. Takeya
    Organic Electron. 14, 1656–1662 (2013)
    DOI: 10.1016/j.orgel.2013.03.009
  • Charge modulation infrared spectroscopy of rubrene single-crystal field-effect transistors
    R. Uchida, H. Yada, M. Makino, Y. Matsui, K. Miwa, T. Uemura, J. Takeya, and H. Okamoto*
    Appl. Phys. Lett. 102, 093301 (2013)
    DOI: 10.1063/1.4794055
  • Anomalous pressure effect in heteroacene organic field-effect transistors
    K. Sakai*, Y. Okada, S. Kitaoka, J. Tsurumi, Y. Ohishi, A. Fujiwara, K. Takimiya, and J. Takeya*
    Phys. Rev. Lett. 110, 096603 (2013)
    DOI: 10.1103/PhysRevLett.110.096603
  • Two-dimensional crystal growth of thermally converted organic semiconductors at the surface of ionic liquid and high-mobility organic field-effect transistors
    J. Soeda, T. Okamoto*, A. Hamaguchi, Y. Ikeda, H. Sato, A. Yamano, and J. Takeya*
    Organic Electron. 14, 1211–1217 (2013)
    DOI: 10.1016/j.orgel.2013.01.004
  • Benzopyrazine-fused tetracene derivatives: Thin-film formation at the crystalline mesophase for solution-processed hole transporting devices
    S. Kojima, T. Okamoto*, K. Miwa, H. Sato, J. Takeya*, and Y. Matsuo*
    Organic Electron. 14, 437–444 (2013)
    DOI: 10.1016/j.orgel.2012.10.029

International Conference

Invited

    • V-shaped organic semiconductors having solution-processed high mobility and high thermal durability
      T. Okamoto, C. Mitsui, M. Yamagishi, J. Soeda, Y. Hirose, T. Matsushita, H. Sato, A. Yamano, T. Uemura, and J. Takeya
      2013 Optics+Photonics (SPIE)
      San Diego Convention Center, San Diego, California, USA, Aug. 25-29, 2013
    • V-Shaped High-Performance Organic Semiconductors
      T. Okamoto, C. Mitsui, M. Yamagishi,T. Matsushita, J. Soeda, Y. Hirose, K. Nakahara, H. Sato, A. Yamano, T. Uemura, and J. Takeya
      15th Asian Chemical Congress (15acc)
      Resorts World Sentosa, Singapore, Aug. 19-23, 2013
    • High-speed and high-power three-dimensional organic field-effect transistors
      M. Uno, B. S. Cha, K. Nakayama, K. Takimiya, and J. Takeya
      ISCS2013
      Kobe Convention Center, Kobe, Japan, May 19-23, 2013
    • Materials and devices of high-end organic transistors
      J. Takeya
      The 9th International Thin-Film Transistor Conference
      The University of Tokyo, Mar. 2, 2013
    • Intermolecular electronic coherence in organic single-crystal transistors and high-speed organic electronics
      J. Takeya
      German-Japanese International Workshop
      Magnus-Haus Berlin, Germany, Jan. 10, 2013

Oral

    • Novel Solution Process for Inch-Sized Single-Crystalline Organic Semiconductors and Application for Arrayed TFTs
      J. Soeda, T. Uemura, T. Okamoto, C. Mitsui, H. Matsui and J. Takeya
      2013 International Conference on Solid State Devices and Materials
      Hilton Fukuoka Sea Hawk, Fukuoka, Japan, Sept. 24-27, 2013
    • Carrier Localization in Organic Transistors with Polymer Gate Insulators
      H. Matsui, A. S. Mishchenko, and T. Hasegawa
      2013 International Conference on Solid State Devices and Materials
      Hilton Fukuoka Sea Hawk, Fukuoka, Japan, Sept. 24-27, 2013
    • A Solution Process of Inch-size Organic Single-Crystalline Thin Films for High-Mobility Transistor Arrays
      J. Soeda, T. Uemura, T. Okamoto, C. Mitsui, H. Matsui and J. Takeya
      2013 JSPS-MRS Joint Symposia
      Doshisha University, Kyoto, Japan, Sept. 16-20, 2013
    • Potential Fluctuation at Organic Semiconductor/Polymer Insulator Interfaces
      H. Matsui, A. S. Mishchenko, and T. Hasegawa
      2013 JSAP-MRS Joint Symposia
      Doshisha University, Kyoto, Japan, Sept. 16-20, 2013
    • High-speed, low-voltage organic single-crystal transistors gated with ionic liquid
      M. Uno, B.S. Cha, K. Miwa, T. Uemura, A. Facchetti, and J. Takeya
      2013 MRS Spring meeting
      Moscone West Convention Center, San Francisco, California, USA, Apr. 4, 2013

Poster

  • Heteroacene-based organic single crystal transistors under high pressure
    K. Sakai, Y. Okada, S. Kitaoka, J. Tsurumi, Y. Ohishi, A. Fujiwara, H. Sato, A. Yamano, M. Yamagishi, C. Mitsui, T. Okamoto, K. Takimiya and J. Takeya
    2013 International Conference on Solid State Devices and Materials
    Hilton Fukuoka Sea Hawk, Fukuoka, Japan, Sept. 24-27, 2013
  • Alkylated Furan Fused V-Shaped Organic Semiconductors with High Charge Carrier Mobility
    K. Nakahara, T. Okamoto, C. Mitsui, M. Yamagishi, T. Ueno, Y. Tanaka, M. Yano, J. Soeda, Y. Hirose, H. Sato, A. Yamano, T. Uemura, and J. Takeya
    15th Asian Chemical Congress
    Resorts World Sentosa, Singapore, Aug. 19-23, 2013
  • Chalcogen bridged W-shaped molecules as a new class of organic semiconductors
    C. Mitsui, T. Okamoto, M. Yamagishi, T. Matsushita, J. Soeda, K. Miwa, H. Sato, A. Yamano, T. Uemura, and J. Takeya
    15th International Symposium on Novel Aromatic Compounds (ISNA-15)
    Howard Civil Service International House, Taipei, Taiwan, Jul. 28–Aug. 2, 2013
  • V-Shaped Organic Semiconductors: Stabilized Crystal Phases and High-Mobility Solution-Processable Transistors
    T. Okamoto, C. Mitsui, M. Yamagishi,K. Nakahara, J. Soeda, H. Sato, A. Yamano, T. Matsushita, T. Uemura, and J. Takeya
    15th International Symposium on Novel Aromatic Compounds (ISNA-15)
    Howard Civil Service International House, Taipei, Taiwan, Jul. 28–Aug. 2, 2013