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Keywords:

  • cascades;
  • polymer photovoltaics;
  • recombination;
  • interlayers;
  • crosslinking
Thumbnail image of graphical abstract

An energy cascading structure is designed in a polymer photovoltaic device to suppress recombination and improve quantum yields. By the insertion of a thin polymer interlayer with intermediate energy levels, electrons and holes can effectively shuttle away from each other while being spatially separated from recombination. An increase in open-circuit voltage and short-circuit current are observed in modified devices.