Charge-transfer dynamics at the dye-semiconductor interface of photocathodes for solar energy applications

  1. Lookup NU author(s)
  2. Fiona Black
  3. Chris Wood
  4. Gareth Summers
  5. Dr Elizabeth Gibson
Author(s)Black FA, Wood CJ, Ngwerume S, Summers GS, Clark IP, Towrie M, Camp JE, Gibson EA
Publication type Article
JournalFaraday Discussions
ISSN (print)1359-6640
ISSN (electronic)1364-5498
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This article describes a comparison between the photophysical properties of two charge-transfer dyes adsorbed onto NiO via two different binding moieties. Transient spectroscopy measurements suggest that the structure of the anchoring group affects both the rate of charge recombination between the dye and NiO surface and the rate of dye regeneration by an iodide/triiodide redox couple. This is consistent with the performance of the dyes in p-type dye sensitised solar cells. A key finding was that the recombination rate differed in the presence of the redox couple. These results have important implications on the study of electron transfer at dye|semiconductor interfaces for solar energy applications.
PublisherRoyal Society of Chemistry
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