Dye-sensitized solar cells: Driving-force effects on electron recombination dynamics with cobalt-based shuttles

Michael J. DeVries, Michael J. Pellin, Joseph T Hupp

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

A series of cobalt-containing redox couples, based on [Co(1, 10-phenanthroline)3](ClO4)2 and its derivatives, were prepared for use as regenerators/shuttles in dye-sensitized solar cells featuring modified TiO2 photoelectrodes. Surface modification and trap-state passivation of the TiO2 nanoparticle film electrodes were accomplished via atomic layer deposition of an ultrathin alumina coating. Electron lifetimes were then extracted from open-circuit voltage decay measurements. Cells employing alumina barrier/passivation layers exhibited higher open-circuit voltages as shuttles with more positive redox potentials were used, with the Co(5-nitro-phen)33+/2+ couple exhibiting the highest V (0.844 V). Analysis of the open-circuit voltages and electron lifetimes indicate Marcus normal-region behavior for back electron transfer from the TiO2 photoanode to these compounds.

Original languageEnglish
Pages (from-to)9082-9087
Number of pages6
JournalLangmuir
Volume26
Issue number11
DOIs
Publication statusPublished - Jun 1 2010

Fingerprint

electron recombination
Open circuit voltage
Cobalt
open circuit voltage
cobalt
Aluminum Oxide
solar cells
dyes
Passivation
passivity
Electrons
Alumina
aluminum oxides
life (durability)
regenerators
Atomic layer deposition
Regenerators
atomic layer epitaxy
Surface treatment
high voltages

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Dye-sensitized solar cells : Driving-force effects on electron recombination dynamics with cobalt-based shuttles. / DeVries, Michael J.; Pellin, Michael J.; Hupp, Joseph T.

In: Langmuir, Vol. 26, No. 11, 01.06.2010, p. 9082-9087.

Research output: Contribution to journalArticle

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