Thiophene fluorination to enhance photovoltaic performance in low band gap donor-acceptor polymers

被引：65
|
作者：
Fei, Zhuping [1 ,2 ]
Shahid, Munazza [1 ,2 ]
Yaacobi-Gross, Nir [2 ,3 ]
Rossbauer, Stephan [2 ,3 ]
Zhong, Hongliang [1 ,2 ]
Watkins, Scott E. [4 ]
Anthopoulos, Thomas D. [2 ,3 ]
Heeney, Martin [1 ,2 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
[2] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England
[3] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England
[4] CSIRO, Melbourne, Vic 3169, Australia
来源：
CHEMICAL COMMUNICATIONS | 2012年 / 48卷 / 90期
基金：
英国工程与自然科学研究理事会;
关键词：
HETEROJUNCTION SOLAR-CELLS; CONJUGATED POLYMERS; DITHIENOGERMOLE; 2,1,3-BENZOTHIADIAZOLE; COPOLYMERS; DESIGN;
D O I：
10.1039/c2cc35079c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report the first synthesis of a tetrafluorinated 4,7-bis(3,4-difluorothiophen-2-yl)-2,1,3-benzothiadiazole monomer and its polymerisation with dithieno[3,2-b:2',3'-d]germole by Stille coupling to afford a low band gap polymer with a high ionisation potential. Direct comparison to the nonfluorinated analogue demonstrates that fluorination results in an increase in ionisation potential with no change in optical band gap, and enhanced aggregation over the non-fluorinated polymer. These desirable properties result in a significant enhancement in OPV device performance in blends with PC71BM.
引用
收藏
页码：11130 / 11132
页数：3
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