Amorphous Dithenylcyclopentadienone-Carbazole copolymer for Organic Thin-Film Transistors

ORAL

Abstract

We developed a new high performance amorphous donor-acceptor conjugated copolymer consisting dithienylcylclopentadienone subunit as an electron acceptor and carbazole derivative as an electron donor. X-ray diffraction analysis shows no scattering patterns, indicating a disordered amorphous solid is formed. A high on/off current ratio of approximately 10$^{6}$ and a high field effect mobility of 2.24\times$10$^{-2}$ cm$^{2}$ V$^{-1}$s$^{-1}$ were obtained with stable output characteristics. The high performance of the amorphous copolymer is ascribed to the relatively low activation energy and low characteristic temperature obtained from a low temperature transport analysis, reflecting that localization of the charge carrier is not substantial in the film.

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Authors

  • E. Kang

    Center for Supersolid and Quantum Matter Research, Korea Advanced Institute of Science and Technology

  • J. Yuen

    Center for Polymers and Organic Solids, University of California, Santa Barbara

  • W. Walker

    Department of Chemistry and Biochemistry, University of California, Los Angeles

  • Nelson Coates

    Center for Polymers and Organic Solids, University of California, Santa Barbara, Physics, University of California, Santa Barbara

  • S. Cho

    Center for Polymers and Organic Solids, University of California, Santa Barbara

  • E. Kim

    Center for Supersolid \& Quantum Matter Research and Physics Department, KAIST, Daejeon, South Korea, Center for Supersolid and Quantum Matter Research, Korea Advanced Institute of Science and Technology, Department of Physics and Center for Supersolid and Quantum Matter Research, KAIST, Daejeon, South Korea

  • F. Wudl

    Center for Polymers and Organic Solids, University of California, Santa Barbara