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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (7): 581-586.    下一篇

研究论文

溴蒸气掺杂聚苯乙炔的导电机理

梁 旦 韩菲菲 王红敏 唐国强 叶 葏
吴玲娟 徐学诚*

  

  1. (华东师范大学物理系纳米功能材料与器件研究中心 上海 200062)

  • 投稿日期:2008-09-19 修回日期:2008-11-18 发布日期:2009-04-14
  • 通讯作者: 徐学诚

Conducting Mechanism of Polyphenylacetylene Doped by Bromine Vapor

Liang, Dan Han, Feifei Wang, Hongmin Tang, Guoqiang
Ye, Jing Wu, Lingjuan Xu, Xuecheng*
  

  1. (Department of Physics, Center of Functional Nanomaterials and Devices, East China Normal University, Shanghai 200062)
  • Received:2008-09-19 Revised:2008-11-18 Published:2009-04-14
  • Contact: Xu, Xuecheng

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被引次数

9 | 3

通过溴蒸气的吸附, 聚苯乙炔(PPA)的电导率比吸溴前提高近12个数量级. 采用固体紫外光谱、X光电子能谱研究了溴与PPA之间的p-π共轭效应, 探讨了掺溴PPA的导电机理. 研究表明, PPA掺溴产生了溴负离子和电子转移复合物, 促使导电率提高. 实验证明压力作用的增大有利于增强溴与PPA之间的共轭作用, 温度升高导致掺溴PPA中p-π共轭结构减少, 导致电导率降低.

关键词: 溴, 聚苯乙炔, p-π共轭, 导电机理, 压力, 温度

Through absorption of bromine vapor, the electrical conductivity of poly(phenylacetylene) (PPA) was enhanced by 1012 times. UV-Vis spectra, and XPS spectra were used to study the p-π conjugation and the conducting mechanism in bromine doped PPA. The experiment indicated that the bromine anion and charge transfer complex (CTC) formed in bromine doped PPA could promote the conductivity. The experiment illuminates that increase of the pressure can promote the conjugation between PPA and bromine and the increase of the temperature leads to the decrease of the p-π conjugated formation in PPA to reduce the conductivity.

Key words: bromine, poly(phenylacetylene), p-π conjugation, conducting mechanism, pressure, temperature