Investigation of excited states in polymer/fullerene solar cells by means of photoinduced reflection-/absorption spectroscopy

被引：16

作者：

Arndt, C

Zhokhavets, U

Gobsch, G ^{[1
]}

Winder, C

Lungenschmied, C

Sariciftci, NS

机构：

[1] Tech Univ Ilmenau, Inst Phys, D-98684 Ilmenau, Germany

[2] Johannes Kepler Univ, LIOS, A-4040 Linz, Austria

[3] Johannes Kepler Univ, Christian Doppler Lab Plast Solar Cells, A-4040 Linz, Austria

来源：

THIN SOLID FILMS | 2004年 / 451卷

关键词：

photoinduced absorption; conjugated polymers; fullerenes; organic solar cells; photoinduced charge transfer;

D O I：

10.1016/j.tsf.2003.11.037

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The discovery of a photoinduced charge transfer interaction between conjugated polymers and fullerenes has led to intensive spectroscopic investigations of solid state composites of these materials. Based on this charge transfer reaction, high efficient solar cell devices have been developed using the concept of bulk heterojunctions, i.e. blending of the conjugated polymer and fullerene. In this work, we present a spectroscopic study on such devices under working conditions. These devices were investigated by means of photoinduced absorption spectroscopy in reflection geometry at different temperatures and different applied external electric fields. Significant changes in the photoinduced signal were observed upon changing the applied voltage. These changes can be attributed to persistent charge carriers, charge carrier transport and charge carrier injection. From this the mean polaron lifetime, the built-in potential and the fraction of persistent charge carriers was estimated. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：60 / 63

页数：4

共 11 条

[1]

Tracing photoinduced electron transfer process in conjugated polymer/fullerene bulk heterojunctions in real time [J].