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High-mobility, low-power, and fast-switching organic field-effect transistors with ionic liquids
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We report high-mobility rubrene single-crystalfield-effect transistors with ionic-liquid (IL) electrolytes used for gate dielectric layers. As the result of fast ionic diffusion to form electric double layers, their capacitances remain more than even at . With high carrier mobility of in the rubrene crystal, pronounced current amplification is achieved at the gate voltage of only , which is two orders of magnitude smaller than that necessary for organic thin-film transistors with dielectric gate insulators. The results demonstrate that the IL/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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