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Keywords:

  • organic photovoltaics;
  • molecular growth;
  • energy cascade;
  • exciton transfer;
  • fill factor
Thumbnail image of graphical abstract

A cascade-type small-molecule organic photovoltaic cell using a crystalline diindenoperylene film as a nanostructured template is demonstrated. This cell architecture simultaneously realizes organic nanostructure and cascade energy concepts, which significantly improves the photocurrent generation and fill factor, leading to a power conversion efficiency of 5.2 ± 0.3%.