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

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jan 2012Publisher:Royal Society of Chemistry (RSC)Journal:Chemical Communications, volume 48, page 11,130 (issn: 1359-7345, eissn: 1364-548X,

Authors: Munazza Shahid; Nir Yaacobi-Gross; Thomas D. Anthopoulos; Stephan Rossbauer; Martin Heeney; Zhuping Fei; Hongliang Zhong; +1 Authors

doi: 10.1039/c2cc35079c

pmid: 23044933

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

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Abstract

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 non-fluorinated 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 PC(71)BM.

Related Organizations

Imperial College London
United Kingdom
Commonwealth Scientific and Industrial Research Organisation
Australia

Keywords

Halogenation, Polymers, Thiophenes, Thiadiazoles, Solar Energy, Quantum Theory

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