On the efficiency of charge transfer state splitting in polymer:fullerene solar cells

Steve Albrecht, Koen Vandewal*, John R. Tumbleston, Florian S.U. Fischer, Jessica D. Douglas, Jean Frechet, Sabine Ludwigs, Harald Ade, Alberto Salleo, Dieter Neher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

The field dependence and yield of free charge carrier generation in polymer:fullerene blends with varying energetic offsets is not affected when the excitation energy is varied from above band-gap to direct CT state excitation. Instead, the ability of the CT state to split is dictated by the energetic offset between the relaxed CT state and the charge separated (CS) state.

Original languageEnglish (US)
Pages (from-to)2533-2539
Number of pages7
JournalAdvanced Materials
Volume26
Issue number16
DOIs
StatePublished - Apr 23 2014

Keywords

  • charge generation
  • charge transfer states
  • driving force
  • excess energy
  • geminate recombination
  • morphology
  • organic solar cells
  • spectroelectrochemistry

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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