The Origin of DC Electrical Conduction and Dielectric Relaxation in Pristine and Doped Poly(3-hexylthiophene) Films

被引：11

作者：

Singh, Ramadhar ^{[1
]}

Singh, Rajiv K. ^{[1
]}

Kumar, Jitendra ^{[2
]}

Kant, Rama ^{[3
]}

Kumar, Vikram ^{[1
]}

机构：

[1] CSIR, Natl Phys Lab, New Delhi 110012, India

[2] Univ Dayton, Res Inst, Div Met & Ceram, Dayton, OH 45469 USA

[3] Univ Delhi, Dept Chem, Delhi 110007, India

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2010年 / 48卷 / 10期

关键词：

activation energy; charge transport; conjugated polymers; DC conductivity; dielectric constant; dielectric properties; dielectric relaxation; hopping mechanism; poly(3-hexylthiophene); FREQUENCY AC CONDUCTION; POLY(3-OCTYLTHIOPHENE) FILMS; POLYPYRROLE; POLYANILINE; COPOLYMERS; GLASSES; POLYMER;

D O I：

10.1002/polb.21994

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We present here the evidence for the origin of dc electrical conduction and dielectric relaxation in pristine and doped poly(3-hexylthiophene) (P3HT) films. P3HT has been synthesized and purified to obtain pristine P3HT polymer films. P3HT films are chemically doped to make conducting P3HT films with different conductivity level. Temperature (77-350 K) dependent dc conductivity (sigma(dc)) and dielectric constant (epsilon'(omega)) measurements on pristine and doped P3HT films have been conducted to evaluate dc and ac electrical conduction parameters. The relaxation frequency (f(R)) and static dielectric constant (epsilon(0)) have been estimated from dielectric constant measurements. A correlation between dc electrical conduction and dielectric relaxation data indicates that both dc and ac electrical conductions originate from the same hopping process in this system. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 1047-1053, 2010

引用

页码：1047 / 1053

页数：7

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