Isoindigo-3,4-Difluorothiophene Polymer Acceptors Yield “All-Polymer” Bulk-Heterojunction Solar Cells with over 7 % Efficiency

Shengjian Liu, Yuliar Firdaus, Simil Thomas, Zhipeng Kan, Federico Cruciani, Sergei Lopatin, Jean Luc Bredas, Pierre M. Beaujuge

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Poly(isoindigo-alt-3,4-difluorothiophene) (PIID[2F]T) analogues used as “polymer acceptors” in bulk-heterojunction (BHJ) solar cells achieve >7 % efficiency when used in conjunction with the polymer donor PBFTAZ (model system; copolymer of benzo[1,2-b:4,5-b′]dithiophene and 5,6-difluorobenzotriazole). Considering that most efficient polymer-acceptor alternatives to fullerenes (e.g. PC61BM or its C71 derivative) are based on perylenediimide or naphthalenediimide motifs thus far, branched alkyl-substituted PIID[2F]T polymers are particularly promising non-fullerene candidates for “all-polymer” BHJ solar cells.

Original languageEnglish (US)
Pages (from-to)531-535
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number2
StatePublished - Jan 8 2018
Externally publishedYes


  • 3,4-difluorothiophene
  • all-polymer solar cells
  • isoindigo
  • polymer acceptors
  • solar cells

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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