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Keywords:

  • 2, 7-Carbazole;
  • 3, 6-Carbazole;
  • D-π-A-type copolymer;
  • photovoltaic devices;
  • charge transport
Thumbnail image of graphical abstract

The incorporation of 3,6-carbazole units into photoactive copolymers results in conjugation breaks along the polymer backbones and thus in strong intermolecular interactions. Such copolymers provide thermally reproducible morphologies and enhanced device performances over a wide range of annealing temperatures, 100 to 160 °C, with high power conversion efficiencies of over 6%.