Hot exciton dissociation in a conjugated polymer

被引：196

作者：

Arkhipov, VI

Emelianova, EV

Bässler, H

机构：

[1] Univ Marburg, Inst Phys Kern & Makromol Chem, D-35032 Marburg, Germany

[2] Univ Marburg, Zentrum Mat Wissensch, D-35032 Marburg, Germany

[3] Katholieke Univ Leuven, Lab Halfgeleiderfys, B-3001 Heverlee, Belgium

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.82.1321

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A model has been developed to treat field-assisted ultrafast on-chain dissociation of optical excitations in a conjugated polymer. Conversion of the excess photon energy above the singlet exciton into the vibrational heat bath of a polymer segment is considered as a main source of the energy required fur charges to escape from a potential well formed by a superposition of the Coulomb and external electric fields. The calculated yield of carrier photogeneration increases strongly with increasing field but is independent of the temperature in good quantitative agreement with data obtained by Earth er nl. [Chem. Phys. Lett. 288, 147 (1998)] on weakly disordered conjugated ladder-type poly-phenylene. [S0031-9007(98)08372-0].

引用

页码：1321 / 1324

页数：4

共 15 条

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