Interfacial charge transfer and colloidal semiconductor dye-sensitization: Mechanism assessment via Stark emission spectroscopy

Keith A. Walters, Dennis A. Gaal, Joseph T. Hupp

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74 Citations (Scopus)

Abstract

Stark emission spectroscopy has been used to assess the nature of light-induced charge-injection processes occurring at molecular-dye/colloidal-semiconductor interfaces. Experiments reveal that eosin Y injects via a locally excited (LE) state. Coumarin-343 conceivably may react via an interfacial charge transfer state, although a simpler explanation centering on an environmentally perturbed LE state also is consistent with the experimental evidence.

Original languageEnglish
Pages (from-to)5139-5142
Number of pages4
JournalJournal of Physical Chemistry B
Volume106
Issue number20
DOIs
Publication statusPublished - May 23 2002

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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