Delocalized polarons in self-assembled poly(3-hexyl thiophene) nanocrystals

被引：33

作者：

Österbacka, R ^{[1
]}

An, CP ^{[1
]}

Jiang, XM ^{[1
]}

Vardeny, ZV ^{[1
]}

机构：

[1] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

来源：

SYNTHETIC METALS | 2001年 / 116卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

self-organization in macromolecules; polycrystalline thin films; polythiophene and derivatives; photoinduced absorption spectroscopies;

D O I：

10.1016/S0379-6779(00)00429-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the characteristic properties of charged excitations (polarons) in thin films of regioregular poly(3-hexylthiophene) (RRPHT) by optical spectroscopies. We found that the increased interchain coupling that exists in self-assembled lamellae in these films drastically changes the properties of the polaron excitations. The traditional self-localized polaron in one-dimension delocalizes in two-dimensions, resulting in a much-reduced relaxation energy and multiple absorption bands, the most dominant being in the mid-infrared (IR) spectral range. Also it has associated IR and Raman active vibrations with reverse absorption bands [anti-resonances (AR)] compared with the continuum electronic band. The AR are attributed to the electron-phonon interaction. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：317 / 320

页数：4

共 18 条

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