Effects of disorder on the magnetic state of poly(3-hexyl)thiophene

被引：9

作者：

Kahol, PK ^{[1
]}

McCormick, BJ

Epstein, AJ

Pandey, SS

机构：

[1] Wichita State Univ, Dept Phys, Wichita, KS 67260 USA

[2] Wichita State Univ, Dept Chem, Wichita, KS 67260 USA

[3] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[4] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

[5] Kyushu Inst Technol, Dept Comp & Elect, Iizuka, Fukuoka 8208502, Japan

来源：

SYNTHETIC METALS | 2003年 / 135卷 / 1-3期

关键词：

regioregular poly(3-hexyl)thiophene; regiorandom poly(3-hexyl)thiophene; electron paramagnetic resonance;

D O I：

10.1016/S0379-6779(02)00634-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present EPR magnetic susceptibility measurements as a function of temperature on undoped and iodine-doped samples of regioregular (REPHT) and regiorandom (RAPHT) poly(3-hexyl)thiophene. The regioregular and regiorandom forms of poly(3-hexyl)thiophene show different temperature dependences in both the undoped and the doped states. The results are interpreted in the framework of a spin-pairs model, according to which the number of spins in undoped samples is less than one per two-hundred thiophene rings. In doped samples, the number of spins increases to approximately one per ten thiophene rings. In addition to showing the predominant role of bipolarons, different temperature dependences of the magnetic susceptibility data provide a methodology to investigate mesoscopic disorder.

引用

页码：343 / 344

页数：2

共 8 条

[1] Soluble and processable regioregular poly(3-hexylthiophene) for thin film field-effect transistor applications with high mobility [J].