Delayed luminescence spectroscopy of organic photovoltaic binary blend films: Probing the emissive non-geminate charge recombination: Probing the emissive non-geminate charge recombination

Panagiotis E. Keivanidis, Valentin Kamm, Clare Dyer-Smith, Weimin Zhang, Frédéric Laquai, Iain McCulloch, Donal D.C. Bradley, Jenny Nelson

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Organic photovoltaics: Following the direct photoexcitation of the low-energy optical gap PDI component in the F8BT:PDI photovoltaic blend film (step 1), charge generation takes place (steps 2, 3). Non-geminate charge recombination (step 4) results in the generation of delayed luminescence (DL) in the μs time scale (step 5). The DL spectrum originates from an equilibrated charge-transfer (CT) state formed between the components of the composite. The F8BT-PDI CT complex has a ground state character (step 6). Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)5183-5187
Number of pages5
JournalAdvanced Materials
Volume22
Issue number45
DOIs
StatePublished - Dec 1 2010
Externally publishedYes

Keywords

  • bulk heterojunction
  • charge transfer
  • delayed luminescence
  • microstructure
  • non-geminate charge recombination
  • solar cells

ASJC Scopus subject areas

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

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