Synthesis of a conjugated pyrrolopyridazinedione–benzodithiophene (PPD–BDT) copolymer and its application in organic and hybrid solar cells

Astrid Caroline Knall, Andrew O F Jones, Birgit Kunert, Roland Resel, David Reishofer, Peter W. Zach, Mindaugas Kirkus, Iain McCulloch, Thomas Rath*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Abstract: Herein, we describe the synthesis and characterization of a conjugated donor–acceptor copolymer consisting of a pyrrolopyridazinedione (PPD) acceptor unit, and a benzodithiophene (BDT) donor unit. The polymerization was done via a Stille cross-coupling polycondensation. The resulting PPD–BDT copolymer revealed an optical bandgap of 1.8 eV and good processability from chlorobenzene solutions. In an organic solar cell in combination with PC70BM, the polymer led to a power conversion efficiency of 4.5%. Moreover, the performance of the copolymer was evaluated in polymer/nanocrystal hybrid solar cells using non-toxic CuInS2 nanocrystals as inorganic phase, which were prepared from precursors directly in the polymer matrix without using additional capping ligands. The PPD–BDT/CuInS2 hybrid solar cells showed comparably high photovoltages and a power conversion efficiency of 2.2%. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)855-862
Number of pages8
JournalMonatshefte für Chemie - Chemical Monthly
Issue number5
Publication statusPublished - 2017


  • Fullerenes
  • Hybrid nanomaterials
  • Materials science
  • Nanostructures
  • Photovoltaics
  • Polymerization

ASJC Scopus subject areas

  • Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

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