Investigations on the mechanism of carrier transport in plasma polymerized pyrrole thin films

被引：17
作者：
John, Joseph [1 ]
Sivaraman, Sajeev [1 ]
Jayalekshmy, S. [1 ]
Anantharaman, M. R. [1 ]
机构：
[1] Cochin Univ Sci & Technol, Dept Phys, Cochin 682022, Kerala, India
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 07期
关键词：
Thin films; METAL-INSULATOR-TRANSITION; CONDUCTING POLYPYRROLE; ANILINE;
D O I：
10.1016/j.jpcs.2010.03.047
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Plasma polymerization is found to be an excellent technique for the preparation of good quality, pinhole-free, polymer thin films from different monomer precursors. The present work describes the preparation and characterization of polypyrrole (PPy) thin films by ac plasma polymerization technique in their pristine and in situ iodine doped forms. The electrical conductivity studies of the aluminium-polymer-aluminium (Al-polymer-Al) structures have been carried out and a space charge limited conduction (SCLC) mechanism is identified as the most probable mechanism of carrier transport in these polymer films. The electrical conductivity shows an enhanced value in the iodine doped sample. The reduction of optical band gap by iodine doping is correlated with the observed conductivity results. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：935 / 939
页数：5
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