High quantum yield sensitization of nanocrystalline titanium dioxide photoelectrodes with cis-dicyanobis(4,4{prime}-dicarboxy-2,2{prime}-bipyridine)osmium(II) or tris(4,4{prime}-dicarboxy-2,2{prime}-bipyridine)osmium(II) complexes
Journal Article
·
· Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Osmium polypyridyl complexes were used as sensitizers in solar cells that utilize nanocrystalline titanium dioxide photoelectrodes. Exposure of TiO{sub 2} electrodes to sources of Os{sup II}(H{sub 2}L{prime}){sub 2}(CN){sub 2} (where L{prime} is 4,4{prime}-dicarboxylato-2,2{prime}-bipyridine) or OS{sup II}(H{sub 2}L{prime}){sub 3}{sup 2+} extended the light absorption and spectral response of the cell to longer wavelengths than did exposure of TiO{sub 2} to Ru(H{sub 2}L{prime}){sub 3}{sup 2+} extended the light absorption and spectral response of the cell to longer wavelengths than did exposure of TiO{sub 2} to Ru(H{sub 2}L{prime}){sub 2}(NCS){sub 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{sub 2}-based photoelectrochemical cells.
- Research Organization:
- California Inst. of Tech., Pasadena, CA (US)
- Sponsoring Organization:
- US Department of Energy
- DOE Contract Number:
- FG07-96ER14725
- OSTI ID:
- 20030675
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 15 Vol. 104; ISSN 1089-5647; ISSN JPCBFK
- Country of Publication:
- United States
- Language:
- English
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