Nanoscale Phase Separation-Induced Suppression of Geminate Recombination in Low Bandgap Polymer-Fullerene Solar Cells

The short-circuit current of polymer solar cells based on a PCPDTBT：PC71BM blend is substantially increased by using a processing additive. It is found that the significant geminate recombination in the PCPDTBT：PC71 BM blend film is dramatically suppressed by using a processing additive which can pr...

Full description

Saved in:
Bibliographic Details
Published inChinese physics letters Vol. 31; no. 5; pp. 195 - 198
Main Author 刘剑 吴江 邵书艳 谢志元 郭世杰
Format Journal Article
LanguageEnglish
Published 01.05.2014
Subjects
双子星
太阳能电池
富勒烯
相分离
纳米级
聚合物链
诱导
重组
Online AccessGet full text

Cover

More Information
Summary:The short-circuit current of polymer solar cells based on a PCPDTBT：PC71BM blend is substantially increased by using a processing additive. It is found that the significant geminate recombination in the PCPDTBT：PC71 BM blend film is dramatically suppressed by using a processing additive which can produce a nanoscale PCPDTBT and PC71BM phase separation. The processing additive-induced aggregation of PCPDTBT polymer chains and PC71BM molecules can give rise to a driving force for the separation of charge-transfer states at the donor/acceptor interfaces into the free charge carriers and thus geminate recombination is suppressed.
Bibliography:11-1959/O4
The short-circuit current of polymer solar cells based on a PCPDTBT：PC71BM blend is substantially increased by using a processing additive. It is found that the significant geminate recombination in the PCPDTBT：PC71 BM blend film is dramatically suppressed by using a processing additive which can produce a nanoscale PCPDTBT and PC71BM phase separation. The processing additive-induced aggregation of PCPDTBT polymer chains and PC71BM molecules can give rise to a driving force for the separation of charge-transfer states at the donor/acceptor interfaces into the free charge carriers and thus geminate recombination is suppressed.
LIU Jian, WU Jiang, SHAO Shu-Yan, XIE Zhi-Yuan, GUO Shi-Jie（1 State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022 2 The First Bethune Hospital of Jilin University, Changchun 130021）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/5/058801