Dopant-assisted charge carrier photogeneration in conjugated polymers

被引：29
作者：
Arkhipov, VI
Emelianova, EV
Bäassler, H
机构：
[1] IMEC, MCP, B-3001 Heverlee, Belgium
[2] Tech Univ Darmstadt, Inst Mat Sci, D-64281 Darmstadt, Germany
[3] Katholieke Univ Leuven, Semicond Phys Lab, B-3001 Heverlee, Belgium
[4] Univ Marburg, Inst Phys Nucl & Macromol Chem, D-35032 Marburg, Germany
来源：
CHEMICAL PHYSICS LETTERS | 2003年 / 372卷 / 5-6期
关键词：
D O I：
10.1016/S0009-2614(03)00520-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A model of two-step carrier photogeneration in doped conjugated polymers is suggested. On the first step, a dissociation of a relaxed exciton into a Coulombically bound geminate pair (GP) occurs at a charge transfer center which consists of a polymer chain and a nearby dopant or deep trap. On the second step, the GP dissociates into free carriers due to carrier release from the on-chain potential well formed by the Coulomb and external fields. The generation yield is shown to be practically field- and temperature-independent in a polymer with a small on-chain effective carrier mass. (C) 2003 Elsevier Science B.V. All rights reserved.
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收藏
页码：886 / 892
页数：7
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