Published April 20, 2000
| public
Journal Article
High Quantum Yield Sensitization of Nanocrystalline Titanium Dioxide Photoelectrodes withcis-Dicyanobis(4,4'-dicarboxy-2,2'-bipyridine)osmium(II) or Tris(4,4'-dicarboxy-2,2'-bipyridine)osmium(II) Complexes
Abstract
Osmium polypyridyl complexes were used as sensitizers in solar cells that utilize nanocrystalline titanium dioxide photoelectrodes. Exposure of TiO_2 electrodes to sources of Os^(II)(H_2L')_2(CN)_2 (where L' is 4,4'-dicarboxylato-2,2'-bipyridine) or Os^(II)(H_2L')_3^(2+) extended the light absorption and spectral response of the cell to longer wavelengths than did exposure of TiO_2 to Ru(H_2L')_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 TiO_2-based photoelectrochemical cells.
Additional Information
© 2000 American Chemical Society. Received 30 April 1999. Published online 24 March 2000. Published in print 1 April 2000. Support for this project was provided by the U.S. Department of Energy, DE-FG07-96ER14725. We thank Kodak for a generous gift in support of photoelectrochemistry at Caltech. We are grateful to Dr. G. Coia of Caltech for assistance with the instruments used to perform the emission measurements and to Dr. G. W. Walker of Caltech for useful discussions. G.S. thanks FCAR (Fonds pour la Formation de Chercheurs et l'Aide à la Recherche, Québec, Canada) for a doctoral scholarship.Additional details
- Eprint ID
- 79214
- DOI
- 10.1021/jp994033g
- Resolver ID
- CaltechAUTHORS:20170719-150532586
- DE-FG07-96ER14725
- Department of Energy (DOE)
- Fonds pour la Formation de Chercheurs et l'Aide à la Recherche
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2017-07-20Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field