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

Zhuping Fei, Munazza Shahid, Nir Yaacobi-Gross, Stephan Rossbauer, Hongliang Zhong, Scott E. Watkins, Thomas D. Anthopoulos, Martin Heeney*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

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 71BM.

Original languageEnglish (US)
Pages (from-to)11130-11132
Number of pages3
JournalChemical Communications
Volume48
Issue number90
DOIs
StatePublished - Nov 21 2012
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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