SEARCH

SEARCH BY CITATION

Keywords:

  • Heterocycles;
  • Phosphorus;
  • Sulf­ur;
  • Donor–acceptor systems;
  • Copolymerization;
  • Cross-coupling;
  • Photovoltaics

Abstract

Two kinds of phosphole- and benzodithiophene-based copolymers bearing PV=O or PV=NSO2C8H17 functions were prepared by Pd–CuI-promoted Stille coupling reactions, and their optical and electrochemical properties were investigated. Bulk heterojunction organic photovoltaic devices comprised of the new P,S-bridged copolymers and (6,6)-phenyl-C71-butyric acid methyl ester (PC71BM) exhibited power conversion efficiencies of up to 0.65 % under AM1.5 irradiation at 100 mW cm–2.