Electrochemical impedance analysis of the redox switching hysteresis of poly(3,4-ethylenedioxythiophene) films

被引：50

作者：

Hass, R ^{[1
]}

García-Cañadas, J ^{[1
]}

Garcia-Belmonte, G ^{[1
]}

机构：

[1] Univ Jaume 1, Dept Ciencias Expt, E-12080 Castellon de La Plana, Spain

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 577卷 / 01期

关键词：

electrochemical impedance; conducting polymers; hysteresis; PEDOT;

D O I：

10.1016/j.jelechem.2004.11.020

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The effect of the redox hysteresis of poly(3,4-ethylenedioxythiophene) films on the electrochemical mechanisms analyzed by impedance has been studied. Impedance spectra were recorded at fixed steady-state potentials under both negative and positive sweeps. The effects of film thickness were also investigated by varying the polymerization charge used. It has been shown that not only do quasi-equilibrium circuit elements (low-frequency capacitance) vary with the potential sweep direction but also kinetics elements (interfacial charge transfer resistance) depend on it, both exhibiting hysteretic effects. The onset of the charge transfer resistance increase is shifted approximately -300 mV during the negative polarization. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：99 / 105

页数：7

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