Study of Solid/Liquid Interfaces in Organic Field-Effect Transistors with Ionic Liquids

MRS Online Proceedings Library volume 1154, Article number: 515 (2008) Cite this article

Abstract

We report high-mobility rubrene single-crystal field-effect transistors with ionic-liquid electrolytes used for gate dielectric layers. As the result of fast ionic diffusion to form electric double layers, their capacitances remain more than 1.0 µF/cm2 even at 0.1 MHz. With high carrier mobility of 9.5 cm2/Vs in the rubrene crystal, pronounced current amplification is achieved at the gate voltage of only 0.2 V, which is two orders of magnitude smaller than that necessary for organic thin-film transistors with dielectric gate insulators. The results demonstrate that the ionic-liquid/organic semiconductor interfaces are suited to realize low-power and fast-switching field-effect transistors without sacrificing carrier mobility in forming the solid/liquid interfaces.

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Affiliations

  1. Central Research Institute of Electric Power Industry, Materials Science Research Laboratory, Komae, Tokyo, Japan

    Ono Shimpei, Seki Shiro & Miwa Kazumoto

  2. Osaka University, Graduate School of Science, Toyonaka, Osaka, Japan

    Takeya Jun

Authors
  1. Ono Shimpei
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  2. Seki Shiro
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  3. Takeya Jun
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  4. Miwa Kazumoto
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Correspondence to Ono Shimpei.

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Shimpei, O., Shiro, S., Jun, T. et al. Study of Solid/Liquid Interfaces in Organic Field-Effect Transistors with Ionic Liquids. MRS Online Proceedings Library 1154, 515 (2008). https://doi.org/10.1557/PROC-1154-B05-15

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