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Emergent Molecular Function Research Team
Kazuo TAKIMIYA
Team Leader
Kazuo TAKIMIYA (D.Eng.)

Research Areas

The Research Team engages in the development and application of new functional organic molecules. Organic molecules can be designed and synthesized as they should have appropriate molecular and electronic structures for certain functionalities, and such functional molecules are utilized in fabricating optoelectronic devices such as organic field-effect transistors (OFETs) and organic solar cells (organic photovoltaics, OPVs). Recent our achievements are 1) development of high-performance molecular semiconductors applicable to OFETs with the highest mobilities, and 2) development of versatile semiconducting polymers that can be utilized to high performance solution-processed OTFTs and OPVs.

Research Subject

  1. Development of new organic semiconductors
  2. Control of electronic structure of organic semiconductors
  3. Application of organic semiconductors to electronic devices

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window

List of Selected Publications

  1. Takimiya, K., Yamamoto, Y.:
    "Facile Synthesis of Highly π-Extended Heteroarenes, Dinaphtho[2,3-b:2',3'-f]chalcogenopheno[3,2-b]chalcogenophenes, and Their Application to Field-Effect Transistors "
    J. Am. Chem. Soc., 129, 2224-2225 (2007).
  2. Handa, S., Miyazaki, E., Takimiya, K., Kunugi, Y.:
    "Solution-Processible n-Channel Organic Field-Effect Transistors Based on Dicyanomethylene-substituted Terthienoquinoid Derivative "
    J. Am. Chem. Soc., 129, 11684-11685 (2007).
  3. Ebata, H., Izawa, T., Miyazaki, E., Takimiya, K., Ikeda, M., Kuwabara, H., Yui, T.:
    "Highly Soluble [1]Benzothieno[3,2-b]benzothiophene (BTBT) Derivatives for High-Performance, Solution-Processed Organic Field-Effect Transistors "
    J. Am. Chem. Soc., 129, 15732-15733 (2007).
  4. Izawa, T., Miyazaki, E., Takimiya, K.:
    "Molecular Ordering of High-Performance Soluble Molecular Semiconductors and Re-evaluation of Their Field-Effect Transistor Characteristics "
    Adv. Mater., 20, 3388-3393 (2008).
  5. Osaka, I., Abe, T., Shinamura, S., Miyazaki, E., Takimiya, K.:
    "High Mobility Semiconducting Naphthodithiophene Copolymers "
    J. Am. Chem. Soc. 132, 5000-5001 (2010).
  6. Suzuki, Y., Miyazaki, E., Takimiya, K.:
    "Alkyloxycarbonylcyanomethylene-Substituted Thienoquinoidal Compounds: a New Class of Soluble n-Channel Organic Semiconductors for Air-Stable Organic Field-Effect Transistors "
    J. Am. Chem. Soc., 132, 10453-10466 (2010).
  7. Kang, M. J., Doi, I., Mori, H., Miyazaki, E., Takimiya, K., Kuwabara, H., Ikeda, M.:
    "Alkylated Dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophenes (Cn-DNTTs): Organic Semiconductors for High-Performance Thin-Film Transistors "
    Adv. Mater., 23, 1222-1225 (2011).
  8. Shinamura, S., Osaka, I., Miyazaki, E., Nakao, A., Yamagishi, M., Takeya, J., Takimiya K.:
    "Linear- and Angular-Shaped Naphthodithiophenes: Selective Synthesis, Properties, and Application to Organic Field-Effect Transistors "
    J. Am. Chem. Soc. 133, 5024-5035 (2011).
  9. Takimiya, K., Shinamura, S., Osaka, I., Miyazaki, E.:
    "Thienoacene-based Organic Semiconductors "
    Adv. Mater. 23, 4347-4370 (2011).
  10. Osaka, I., Shimawaki, M., Mori, H., Doi, I., Miyazaki, E., Koganezawa, T., Takimiya, K.:
    "Synthesis, Characterization, and Transistor and Solar Cell Applications of A Naphthobisthiadiazole-Based Semiconducting Polymer "
    J. Am .Chem. Soc., 134, 3498-3507.

Members

Principal Investigator

Kazuo TAKIMIYA
Team Leader
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