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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

Sauvé, Geneviève and Cass, Marion E. and Doig, Stephen J. and Lauermann, Iver and Pomykal, Katherine E. and Lewis, Nathan S. (2000) 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. Journal of Physical Chemistry B, 104 (15). pp. 3488-3491. ISSN 1520-6106. https://resolver.caltech.edu/CaltechAUTHORS:20170719-150532586

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/jp994033gDOIArticle
http://pubs.acs.org/doi/abs/10.1021/jp994033gPublisherArticle
ORCID:
AuthorORCID
Lewis, Nathan S.0000-0001-5245-0538
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.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG07-96ER14725
Fonds pour la Formation de Chercheurs et l'Aide à la RechercheUNSPECIFIED
Issue or Number:15
Record Number:CaltechAUTHORS:20170719-150532586
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170719-150532586
Official Citation: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, and Nathan S. Lewis The Journal of Physical Chemistry B 2000 104 (15), 3488-3491 DOI: 10.1021/jp994033g
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79214
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:20 Jul 2017 18:52
Last Modified:03 Oct 2019 18:17

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