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
收藏
页码：A241 / A249
页数：9
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