Doping dependence of electrical and thermal conductivity of nanoscale polyaniline thin films

被引:40
|
作者
Jin, Jiezhu [1 ]
Wang, Qing [1 ]
Haque, M. A. [2 ]
机构
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA
基金
美国国家科学基金会; 新加坡国家研究基金会;
关键词
POLYMERS; BASE;
D O I
10.1088/0022-3727/43/20/205302
中图分类号
O59 [应用物理学];
学科分类号
摘要
We performed simultaneous characterization of electrical and thermal conductivity of 55 nm thick polyaniline (PANI) thin films doped with different levels of camphor sulfonic acids (CSAs). The effect of the doping level is more pronounced on electrical conductivity than on thermal conductivity of PANIs, thereby greatly affecting their ratio that determines the thermoelectric efficiency. At the 60% (the molar ratio of CSA to phenyl-N repeat unit of PANI) doping level, PANI exhibited the maximum electrical and thermal conductivity due to the formation of mostly delocalized structures. Whereas polarons are the charge carriers responsible for the electrical conduction, phonons are believed to play a dominant role in the heat conduction in nanoscale doped PANI thin films.
引用
收藏
页数:5
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