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Transient mid-IR study of electron dynamics in TiO2 conduction band.

Authors
  • Sá, Jacinto
  • Friedli, Peter
  • Geiger, Richard
  • Lerch, Philippe
  • Rittmann-Frank, Mercedes H
  • Milne, Christopher J
  • Szlachetko, Jakub
  • Santomauro, Fabio G
  • van Bokhoven, Jeroen A
  • Chergui, Majed
  • Rossi, Michel J
  • Sigg, Hans
Type
Published Article
Journal
The Analyst
Publisher
The Royal Society of Chemistry
Publication Date
Apr 07, 2013
Volume
138
Issue
7
Pages
1966–1970
Identifiers
DOI: 10.1039/c3an36595f
PMID: 23431560
Source
Medline
License
Unknown

Abstract

The dynamics of TiO2 conduction band electrons were followed with a novel broadband synchrotron-based transient mid-IR spectroscopy setup. The lifetime of conduction band electrons was found to be dependent on the injection method used. Direct band gap excitation results in a lifetime of 2.5 ns, whereas indirect excitation at 532 nm via Ru-N719 dye followed by injection from the dye into TiO2 results in a lifetime of 5.9 ns.

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