High quantum yield sensitization of nanocrystalline titanium dioxide photoelectrodes with cis-dicyanobis(4,4′-dicarboxy-2,2′-bipyridine)osmium(II) or tris(4,4′-dicarboxy-2,2′-bipyridine)osmium(II) complexes

Geneviève Sauvé, Marion E. Cass, Stephen J. Doig, Iver Lauermann, Katherine Pomykal, Nathan S Lewis

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

Osmium polypyridyl complexes were used as sensitizers in solar cells that utilize nanocrystalline titanium dioxide photoelectrodes. Exposure of TiO2 electrodes to sources of OsII(H2L′)2(CN)2 (where L′ is 4,4′-dicarboxylato-2,2′-bipyridine) or OsII(H2L′)32+ extended the light absorption and spectral response of the cell to longer wavelengths than did exposure of TiO2 to Ru(H2L′)2(NCS)2. The Os complexes also provided very high external quantum yields for photocurrent flow and produced open-circuit voltages similar to those of the Ru complex. The Os-based systems therefore offer promise in developing efficient dye-sensitized nanocrystalline TiO2-based photoelectrochemical cells.

Original languageEnglish
Pages (from-to)3488-3491
Number of pages4
JournalJournal of Physical Chemistry B
Volume104
Issue number15
Publication statusPublished - Apr 20 2000

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Photoelectrochemical cells
Osmium
osmium
Quantum yield
Open circuit voltage
Photocurrents
titanium oxides
Titanium dioxide
Light absorption
Solar cells
Coloring Agents
Dyes
Wavelength
Electrodes
electromagnetic absorption
open circuit voltage
cells
spectral sensitivity
photocurrents
solar cells

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Engineering(all)

Cite this

High quantum yield sensitization of nanocrystalline titanium dioxide photoelectrodes with cis-dicyanobis(4,4′-dicarboxy-2,2′-bipyridine)osmium(II) or tris(4,4′-dicarboxy-2,2′-bipyridine)osmium(II) complexes. / Sauvé, Geneviève; Cass, Marion E.; Doig, Stephen J.; Lauermann, Iver; Pomykal, Katherine; Lewis, Nathan S.

In: Journal of Physical Chemistry B, Vol. 104, No. 15, 20.04.2000, p. 3488-3491.

Research output: Contribution to journalArticle

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AB - Osmium polypyridyl complexes were used as sensitizers in solar cells that utilize nanocrystalline titanium dioxide photoelectrodes. Exposure of TiO2 electrodes to sources of OsII(H2L′)2(CN)2 (where L′ is 4,4′-dicarboxylato-2,2′-bipyridine) or OsII(H2L′)32+ extended the light absorption and spectral response of the cell to longer wavelengths than did exposure of TiO2 to Ru(H2L′)2(NCS)2. The Os complexes also provided very high external quantum yields for photocurrent flow and produced open-circuit voltages similar to those of the Ru complex. The Os-based systems therefore offer promise in developing efficient dye-sensitized nanocrystalline TiO2-based photoelectrochemical cells.

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