Nomadic polarization in doped poly(o-methoxyaniline) films

被引：1
|
作者：
Nogueira, JS
Mattoso, LHC
Faria, RM
机构：
[1] CNPDIA,EMBRAPA,BR-13560970 SAO CARLOS,SP,BRAZIL
[2] USP,INST FIS SAO CARLOS,BR-13560970 SAO CARLOS,SP,BRAZIL
来源：
SYNTHETIC METALS | 1997年 / 84卷 / 1-3期
关键词：
polyaniline and derivatives; semiconducting films; transport measurements;
D O I：
10.1016/S0379-6779(96)04159-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The AC conductivity of poly(o-methoxyaniline) - POMA films with various doping levels were studied in the temperature range of 4.2 to 298 K. In the low frequency regime the conductivity is frequency-independent, but above a critical angular frequency omega(c) it obeys an equation of the form sigma(omega) proportional to omega(s). Both the sigma(0) conductivity oo and the critical frequency increase with temperature, whereas the exponential factor s is temperature-independent. Since the conduction of doped POMA is strongly dependent on the electronic mobility along the molecule backbone, a nomadic polarization model of quasi-one-dimensional solids was used to fit the experimental results. Values for the bulk mobility, the carrier density and the transition rate of the intermolecular charge transfer were estimated.
引用
收藏
页码：813 / 814
页数：2
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