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Orientation of Organic Semiconductor Films on Photoreactive Polyimide Films and its Influence on Field-Effect Transistor Characteristics

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Abstract

In this study, we have investigated the effect of surface treatment on the orientation and mobility of pentacene by using a photoreactive polyimide film to modify the gate-insulator surfaces of organic field effect transistors (OFETs). Surface modification includes a photoreactive polyimide film, presenting a passivated interface on which the semiconductor can grow. This polyimide film can control of the orientation of semiconductor by using linearly polarized deep UV (LPDUV) irradiation. Fabricated OFETs include stacked structures of Ta2O5 as the gate insulators and the photoreactive polyimide. Most of the characteristic parameters of the OFETs, such as carrier mobility and on/off current ration, have been improved by using the photo-alignment treatment achieved with LPDUV irradiation.

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Authors and Affiliations

  1. Department of Applied Physics, Seikei University, Musashino-shi, Tokyo, 180-8633, Japan

    Yuichiro Uchida & Kuniharu Takizawa

Authors
  1. Hiroshi Kikuchi
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  2. Yuichiro Uchida
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  3. Yoshihide Fujisaki
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  4. Hiroto Sato
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  5. Hideo Fujikake
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  6. Taiichiro Kurita
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  7. Kuniharu Takizawa
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  8. Fumio Sato
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Kikuchi, H., Uchida, Y., Fujisaki, Y. et al. Orientation of Organic Semiconductor Films on Photoreactive Polyimide Films and its Influence on Field-Effect Transistor Characteristics. MRS Online Proceedings Library 871, 37 (2005). https://doi.org/10.1557/PROC-871-I3.7

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  • DOI: https://doi.org/10.1557/PROC-871-I3.7

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