Ultrafast electron transfer and decay dynamics in a small band gap bulk heterojunction material

被引：196

作者：

Hwang, In-Wook

Soci, Cesare

Moses, Daniel ^{[1
]}

Zhu, Zhengguo

Waller, David

Gaudiana, Russell

Brabec, Christoph J.

Heeger, Alan J.

机构：

[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

[2] Konarka Technol Inc, Lowell, MA 01852 USA

[3] Konarka Technol Austria, A-4040 Linz, Austria

来源：

ADVANCED MATERIALS | 2007年 / 19卷 / 17期

关键词：

D O I：

10.1002/adma.200602437

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photoinduced electron transfer in a small band gap bulk heterojunction material (see figure) is studied by ultrafast spectroscopic methods. In this composite, the photo excitation initiates ultrafast electron transfer from the polymer to the fullerene, as in most bulk heterojunction materials. From analysis of the carrier recombination dynamics, we infer the existence of an intermediate charge transferred state from which long-lived mobile positive and negative carriers are generated.

引用

页码：2307 / +

页数：7

共 26 条

[1] Recombination studies in a polyfluorene copolymer for photovoltaic applications [J].