导电聚合物有序超薄膜结构及光电特性  

Structure and Photoelectric Characteristic of Ordered Conducting Polymer Ultra Thin Film

作　　者：郑华靖[1] 徐建华[1] 蒋亚东[1] 杨亚杰[1] 

机构地区：[1]电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《光电工程》2010年第10期34-40,46,共8页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(60372002)

摘　　要：采用LB膜诱导沉积法制备聚(3,4)乙烯二氧噻吩(PEDOT)高度有序导电聚合物薄膜。实验表明,聚(3,4)乙烯二氧噻吩-聚苯乙烯磺(PEDOT-PSS)纳米粒子对单分子层具有包裹作用,形成了稳定的复合单分子膜;二次离子质谱(SIMS)和小角X射线反射(XRR)分析表明十八胺-硬脂酸/聚(3,4)乙烯二氧噻吩-聚苯乙烯磺(ODA-SA/PEDOT-PSS)组装体优于十八胺/聚(3,4)乙烯二氧噻吩-聚苯乙烯磺ODA/PEDOT-PSS,具有更好的成膜性能,表面粗糙度小且稳定可控,薄膜具有较好的有序结构。设计了不同的测试结构,测量了复合膜的垂直电导率和水平电导率,研究了薄膜的直流电流-电压特性,采用变程跳跃模型(VRH)对结果进行了拟合,表明三维变程跳跃模型(3D-VRH)可以较好的解释多层膜中载流子的迁移。A Langmuir-Blodgett （LB） inducing method was firstly used to prepare single layer and multilayer conducting composite PEDOT-PSS film. It is shown that better film-processing ability of PEDOT-PSS can be achieved by spreading ODASA mixed rnonolayer on the PEDOT-PSS sub phase. The Surface of ODA-SA/PEDOT-PSS mixed LB films appears much finer, steady and easy to be controlled with a relatively better ordered structure. Different structures were designed to test the conductive ability of these composite films and a Variable Range Hopping （VRH） model was used to explain the film conductive mechanism. The results indicate that a 3D-VRH model explains well transferring of charge carrier in multilayer film.

关 键 词：导电聚合物 聚3 4-乙烯二氧噻吩/聚苯乙烯磺酸 LB膜 电导率 

分 类 号：O484.41[理学—固体物理]