Study on charge-transfer state in a donor-acceptor polymer heterojunction

被引：26

作者：

Gao, Kun ^{[1
]}

Xie, Shijie ^{[1
]}

Yin, Sun ^{[1
]}

Liu, Desheng ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

ORGANIC ELECTRONICS | 2011年 / 12卷 / 06期

关键词：

Excitation; Charge transfer; Heterojunctions; Polymers; SOLAR-CELLS; EXCITON DISSOCIATION; RECOMBINATION; SEPARATION; EFFICIENT; EMISSION; DEVICES;

D O I：

10.1016/j.orgel.2011.03.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Charge-transfer (CT) state in a donor-acceptor polymer heterojunction is theoretically investigated. The simulations are performed within the framework of an extended version of the one-dimensional Su-Schrieffer-Heeger tight-binding model combined with a non-adiabatic evolution method. We firstly focus on the formation and stability of a CT state in a static picture, in which case the effect of the energy offset is mainly concerned. Subsequently, dynamic process for the CT state formation and recombination is addressed. It is found that there exists a critical energy offset for the charge transfer and recombination, which is determined by both the exciton binding energy and the CT state one. The investigation may give a light to the optoelectronic and magnetic applications for organic polymers. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1010 / 1016

页数：7

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