Issue 90, 2012

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

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 PC71BM.

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

Supplementary files

Article information

Article type
Communication
Submitted
16 Jul 2012
Accepted
26 Sep 2012
First published
27 Sep 2012

Chem. Commun., 2012,48, 11130-11132

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

Z. Fei, M. Shahid, N. Yaacobi-Gross, S. Rossbauer, H. Zhong, S. E. Watkins, T. D. Anthopoulos and M. Heeney, Chem. Commun., 2012, 48, 11130 DOI: 10.1039/C2CC35079C

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