Published Papers

  • Large surface relaxation in the organic semiconductor tetracene
    Hazuki Morisaki,  Takashi Koretsune,  Chisa Hotta,  Jun Takeya,  Tsuyoshi Kimura  & Yusuke Wakabayashi
    Nature Communications 5, 5400
    DOI:10.1038/ncomms6400
  • Transition between band and hopping transport in polymer field-effect transistors
    Yu Yamashita, Junto Tsurumi, Felix Hinkel, Yugo Okada, Junshi Soeda, Wojciech Zajączkowski, Martin Baumgarten, Wojciech Pisula, Hiroyuki Matsui, Klaus Müllen, and Jun Takeya
    Adv. Mater. 26, 8169–8173
    DOI: 10.1002/adma.201403767
  • Carrier dynamics of rubrene single-crystals revealed by transient broadband terahertz spectroscopy
    Uchida, R,  Sekine, H,  Terashige, T,  Tao, S,  Matsui, Y, Kida, N,　Fratini, S,   Ciuchi, S,   Okada, Y,   Uemura, T, Takeya, J, Okamoto, H
    Appl. Phys. Lett. 105 14
    DOI:10.1063/1.4897530
  • Highly Oriented Polymer Semiconductor Films Compressed at the Surface of Ionic Liquids for High-Performance Polymeric Organic Field-Effect Transistors
    Junshi Soeda, Hiroyuki Matsui, Toshihiro Okamoto, Itaru Osaka, Kazuo Takimiya and Jun Takeya
    Adv. Mater. 26, 6430–6435
    DOI: 10.1002/adma.201401495
  • Clean surface processing of rubrene single crystal immersed in ionic liquid by using frequency modulation atomic force microscopy
    Yasuyuki Yokota, Hisaya Hara, Yusuke Morino, Ken-ichi Bando, Akihito Imanishi, Takafumi Uemura, Jun Takeya and Ken-ichi Fukui
    Appl. Phys. Lett. 104, 263102 (2014)
    DOI:10.1063/1.4886154
  • Facile strain analysis of largely bending films by a surface-labelled grating method
    Norihisa Akamatsu, Wataru Tashiro, Keisuke Saito, Jun-ichi Mamiya, Motoi Kinoshita, Tomiki Ikeda, Jun Takeya, Shigenori Fujikawa, Arri Priimagi & Atsushi Shishido
    Scientific Reports  4, 5377
    DOI:10.1038/srep05377
  • Polarization fatigue of organic ferroelectric capacitors
    Dong Zhao,  Ilias Katsouras,  Mengyuan Li,  Kamal Asadi,  Junto Tsurumi,  Gunnar Glasser,  Jun Takeya,  Paul W. M. Blom  & Dago M. de Leeuw
    Scientific Reports  4, 5075
    DOI:10.1038/srep05075
  • High-Performance Solution-Processable N-Shaped Organic Semiconducting Materials with Stabilized Crystal Phase
    Chikahiko Mitsui, Toshihiro Okamoto, Masakazu Yamagishi, Junto Tsurumi, Kazumi Yoshimoto, Katsumasa Nakahara, Junshi Soeda, Yuri Hirose, Hiroyasu Sato, Akihito Yamano, Takafumi Uemura and Jun Takeya
    Adv. Mater. 26, 4546-4551 (2014)
    DOI: 10.1002/adma.201400289
  • High-mobility organic transistors with wet-etch-patterned top electrodes: a novel patterning method for fine-pitch integration of organic devices
    K. Nakayama, M. Uno*, T. Uemura, N. Namba, Y. Kanaoka, T. Kato, M. Katayama, C. Mitsui, T. Okamoto, J. Takeya*
    Advanced Material Interfaces (Wiley) accepted
    DOI: 10.1002/admi.201300124
  • Anomalous Response in Heteroacene-Based Organic Field Effect Transistors under High Pressure
    K. Sakai*, and J. Takeya*
    Electronics, 255-265, 3, (2014).
    DOI: 10.3390/electronics3020255
  • Solution-processed single-crystalline organic transistors on patterned ultrathin gate insulators
    Junto Tsurumi, Atefeh Yousefi Amin, Toshihiro Okamoto, Chikahiko Mitsui,
    Kazuo Takimiya, Hiroyuki Matsui*, Marcus Halik*, Jun Takeya*
    Org. Electron. 15, 1184-1188 (2014).
    DOI: 10.1016/j.orgel.2014.02.028
  • Split-Gate Organic Field-Effect Transistors for High-Speed Operation
    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, and J. Takeya*
    Adv. Mater. 26, 2983–2988 (2014).
    DOI: 10.1002/adma.201304976
  • Ultrafast exciton dynamics in dinaphtho[2,3-b:2′3′-f]thieno[3,2-b]-thiophene thin films
    Y. Ishino, K. Miyata, T. Sugimoto, K. Watanabe*, Y. Matsumoto, T. Uemura and J. Takeya
    Phys. Chem. Chem. Phys 16, 7501-7512 (2014).
    DOI: 10.1039/C3CP54157F

International Conference

Invited

  • Uniaxial orientation of semiconducting polymer films compressed on ionic liquids
    H. Matsui, J. Soeda, Y. Yamashita, J. Takeya
    EMN Open Access Week 2014
    Chengdu, China, September 22-25, 2014
  • Effect of pressure on electronic charge coherence in organic semiconductor single crystals
    J. Takeya
    APS March Meeting 2014
    Denver, Colorado, USA, March 3–7, 2014

Oral

  • Charge transport in small molecule and  polymer organic transistors
    H. Matsui
    MPIP-Osaka Univ. Joint Symposium
    Mainz, Germany, November 17, 2014
  • Systematic Study of Band Calculations for High-Mobility Organic Semiconductors
    H. Matsui, T. Okamoto, C. Mitsui, M. Yamagishi, H. Sato, A. Yamano, and J. Takeya
    International Workshop on Field-Effect Transistors and Functional Interfaces
    Kashiwa, Japan, October 20, 2014
  • Hybridization of HOMO and Next HOMO in Organic Semiconductor Crystals Revealed by Band Calculations
    H. Matsui, T. Okamoto, C. Mitsui, M. Yamagishi, H. Sato, A. Yamano, and J. Takeya
    2014 International Conference on Solid State Devices and Materials
    Tsukuba, Japan, September 8-11, 2014
  • Correlation between Effective Mass and Mobility for High-Mobility Organic Semiconductors: Evidence for Band Transport
    H. Matsui, T. Okamoto, M. Yamagishi, C. Mitsui, H. Sato, A. Yamano, and J. Takeya
    Materials Research Society Spring Meeting 2014
    San Francisco, USA, April 24, 2014
  • Near Surface Structure of Organic Semiconductor Tetracene Single Crystal
    Y. Wakabayashi, H. Morisaki, T. Kimura, K. Miwa, T. Koretsune and J. Takeya
    APS March Meeting 2014
    Denver, Colorado, USA, March 3–7, 2014