Organic Field-Effect Transistors with Crosslinkable Poly(vinyl alcohol) Insulator and Spin-Coated/Drop-Cast Poly(3-hexylthiophene-2,5-diyl) Semiconductor
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概要
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Organic field-effect transistors (OFETs) with water-soluble and crosslinkable poly(vinyl alcohol) (PVA) as a gate insulator and poly(3-hexylthiophene) (P3HT) as an active semiconductor were fabricated, and the device performances were investigated. Heat-crosslinked PVA displays better dielectric properties because it contains less water and the OFETs show enhanced on/off ratios and improved stability. P3HT films were fabricated by spin-coating and drop-casting methods and characterized by atomic force microscopy (AFM) and UV–visible absorption spectra. The mobilities of drop-cast P3HT films are one order higher than those of the spin-coated films, which is ascribed to the slower drying of the solvent and more-ordered structure in the films. However, OFETs with drop-cast P3HT show inferior saturation characteristics and lower on/off ratios. This is probably due to higher roughness and thickness of the drop-cast film and nonnegligible carrier transportation in the bulk, which can be demonstrated by the conductance measurements.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-03-30
著者
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Kojima Kenzo
Department Of Electrical Engineering Aichi Institute Of Technology
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Ohashi Asao
Department Of Electrical Engineering Aichi Institute Of Technology
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Ochiai Shizuyasu
Department Of Electrical Engineering Aichi Institute Of Technology
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Sawa Goro
Department Of Electrical And Electronic Engineering Mie University
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Uchida Yoshiyuki
Department Of Electrical Engineering Aichi Institute Of Technology Toyota
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Wang Xin
Department Of Advanced Systems Control Engineering Graduate School Of Science And Engineering Saga U
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Mizutani Teruyoshi
Department of Electrical and Electronic Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0529, Japan
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Wang Xin
Department of Electrical Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
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