Enhancement of carrier mobilities in poly(3-methylthiophene) by an electrochemical doping

被引：73

作者：

Harima, Y ^{[1
]}

Eguchi, T ^{[1
]}

Yamashita, K ^{[1
]}

机构：

[1] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 739, Japan

来源：

SYNTHETIC METALS | 1998年 / 95卷 / 01期

关键词：

polythiophene and derivatives; conductivity; mobility; doping; time-of-flight;

D O I：

10.1016/S0379-6779(98)00035-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combination of potential-step chronocoulometry and in situ conductivity measurement leads to a successful evaluation of mobilities of positive charge carriers in poly(3-methylthiophene) at room temperature over a wide range of a doping level from 0.02 to 23%. A carrier mobility of 2x10(-5) cm(2) V-1 s(-l) at a lightly doped region compares well with the one obtained with the time-of-flight technique. The mobility starts to increase at around 0.1% doping level and it reaches 0.13 cm2 V-1 s(-1). The drastic mobility enhancement over four orders of magnitude provides a strong indication that a conduction mechanism is switched from a hopping to metallic transport. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：69 / 74

页数：6

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