Subnanosecond charge photogeneration and recombination in polyfluorene copolymer-fullerene solar cell: Effects of electric field

被引：3

作者：

Zhang, Wei ^{[1
,2
]}

Huang, Ye ^{[3
]}

Xing, Ya-Dong ^{[2
]}

Jing, Yan ^{[3
]}

Ye, Long ^{[3
]}

Fu, Li-Min ^{[2
]}

Ai, Xi-Cheng ^{[2
]}

Hou, Jian-Hui ^{[3
]}

Zhang, Jian-Ping ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

[2] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 05期

关键词：

TRANSFER EXCITONS; SEPARATION; DISSOCIATION; GENERATION; FILMS; DEPENDENCE; MORPHOLOGY; TRANSPORT; DYNAMICS; BLENDS;

D O I：

10.1364/OE.21.00A241

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Influence of electric field on the subnanosecond charge photogeneration dynamics in the polymer solar cell based on polyfluorene copolymer BisDMO-PFDTBT blended with PC61BM was examined with transient absorption spectroscopy. The charge dynamics showed no difference under short- or open-circuit conditions and under a forward bias of 0.79 V (1.6 x 10(5) V/cm), implying negligible field effects on the subnanosecond dynamics of charge photogeneration/recombination. However, under the reverse biases of -2 V (4.0 x 10(5) V/cm) and -5 V (1.0 x 10(6) V/cm), significant enhancement of charge photogeneration and apparent suppression of polaron pair recombination were observed, which agrees with the field-assisted enhancement of external quantum efficiency of the solar cell devices. (c) 2013 Optical Society of America

引用

页码：A241 / A249

页数：9

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