1,8-octanedithiol as a processing additive for bulk heterojunction materials: Enhanced photoconductive response

被引：32

作者：

Coates, Nelson E. ^{[1
]}

Hwang, In-Wook ^{[1
]}

Peet, Jeffrey ^{[1
]}

Bazan, Guillermo C. ^{[1
]}

Moses, Daniel ^{[1
]}

Heeger, Alan J. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, CPOS, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 07期

关键词：

D O I：

10.1063/1.2969405

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present measurements of steady state and transient (tau<70 ps) photoconductivity of the low bandgap polymer poly [2,6-(4,4- bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b'-]dithiophene)-alt- 4,7-(2,1,3-benzothiadiazole)] mixed with [6,6]-phenyl C-71- butyric acid methyl ester films processed with and without the 1,8-octanedithiol additive. The data demonstrate enhanced photoconductive response in the bulk heterojunction material processed with the additive. The increase results primarily from enhanced carrier mobility and to a lesser extent from a more efficient photogeneration of mobile carriers and longer mobile carrier lifetimes. The enhanced photoresponse is consistent with the increase in power conversion efficiency obtained from solar cells in which the bulk heterojunction film is processed using 1,8- octanedithiol. (C) 2008 American Institute of Physics.

引用

页数：3

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