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.

引用

页码：886 / 892

页数：7

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