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Keywords:

  • Donor-Acceptor Chromophores;
  • Oligothiophenes;
  • Photovoltaic Devices;
  • Semiconducting Oligomers
Thumbnail image of graphical abstract

Extended donor-acceptor oligothiophenes exhibit a narrow optical energy gap in combination with strong light absorption and good intermolecular ππ stacking in the solid state for efficient charge transport. Bilayer photovoltaic devices utilizing these oligomers as p-type semiconducting photosensitizers afford high power conversion efficiencies of up to 2.7%.