Very Low-Voltage Operation of Ionic Liquid-Gated n-Type Organic Field-Effect Transistors

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概要

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• n-Type organic field-effect transistors are operated with high transconductance at very low gate voltage using ionic-liquid electrolyte for the gating layers. Tetracyanoquinodimethane single crystals and C60 thin films are respectively interfaced with ionic liquid of 1-ethyl-3-methyl-imidazolium bis(trifluoromethanesulfonyl)imide known for its low viscosity and high ionic conductivity, so that high-density electrons are rapidly accumulated in the semiconductor surfaces. The transistors are gated by high electric field confined to a molecular scale Helmholtz layer with the application of minimum gate voltages. The high-transconductance single-crystal device exhibits excellent air stability and the C60 thin-film transistor has realized the highest normalized transconductance among reported n-type organic transistors, together with remarkable improvement in threshold voltage as compared with that in conventional SiO2 devices.

• 2010-01-25

著者

• Takeya Jun

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

• Takeya Jun

  Graduate School Of Science Osaka University

• Uemura Takafumi

  Graduate School Of Science Osaka University

• Yamagishi Masakazu

  Graduate School Of Medical Science Department Of Internal Medicine Kanazawa University

• ONO Shimpei

  Central Research Institute of Electric Power Industry

• Yamagishi Masakazu

  Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

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