Photoconductivity of C60 as an Origin of Bias-Dependent Photocurrent in Organic Photovoltaics

被引：38

作者：

Jeong, Won-Ik ^{[1
,2
]}

Lee, Yang Eun ^{[1
,2
]}

Shim, Hyun-Sub ^{[1
,2
]}

Kim, Tae-Min ^{[1
,2
]}

Kim, Sei-Yong ^{[1
,2
]}

Kim, Jang-Joo ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, WCU Hybrid Mat Program, Seoul 151744, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

来源：

ADVANCED FUNCTIONAL MATERIALS | 2012年 / 22卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

bias-dependent photocurrent; charge collection efficiency; photoconductivity; planar heterojunction solar cells; organic solar cells; RECOMBINATION; C-60;

D O I：

10.1002/adfm.201200069

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The bulk-ionized photoconductivity of C60 is reported as an origin of the bias-dependent linear change of the photocurrent in copper phthalocyanine (CuPc)/C60 planar heterojunction solar cells, based on the observation of the variation of the bias-dependent photocurrent on excitation wavelengths and the thickness-dependent photocurrent of the C60 layer. A theoretical model, which is a combination of the Braun-Onsager model for the dissociation of excitons at the donor/acceptor interface and the Onsager model for the bulk ionization of excitons in the C60 layer, describes the bias-dependent photocurrent in the devices very well. The bulk-ionized photoconductivity of C60 must generally contribute to the photocurrent in organic photovoltaics, since fullerene and fullerene derivatives are widely used in these devices.

引用

页码：3089 / 3094

页数：6

共 29 条

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