| Panchromatic sensitization of nanocrystalline TiO2 with cis-Bis(4-carboxy-2-[2'-(4'-carboxypyridyl)]quinoline)bis(thiocyanato-N)ruthenium(II). | |
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MedLine Citation:
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PMID: 14632509 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We compared the spectral (IR and Raman), electrochemical, and photoelectrochemical properties of nanocrystalline TiO(2) sensitized with the newly synthesized complex [NBu(4)](2)[cis-Ru(Hdcpq)(2)(NCS)(2)] (1; [NBu(4)](+) = tetrabutylammonium cation; H(2)dcpq = 4-carboxy-2-[2'-(4'-carboxypyridyl)]quinoline) with those of TiO(2) sensitized with [NBu(4)](2)[cis-Ru(Hdcbpy)(2)(NCS)(2)] (2; H(2)dcbpy = 4,4'-dicarboxy-2,2'-bipyridine) and [NBu(4)](2)[cis-Ru(Hdcbiq)(2)(NCS)(2)] (3; H(2)dcbiq = 4,4'-dicarboxy-2,2'-biquinoline). Complex 1 achieved efficient sensitization of nanocrystalline TiO(2) films over a wide visible and near-IR region, generating a large short-circuit photocurrent. The absorbed photon-to-current conversion efficiency decreased in the order 2 > 1 > 3 with the decrease in the free energy change (-Delta G(inj)) of the electron injection from the ruthenium complex to TiO(2). The open-circuit photovoltages (V(oc)'s) of dye-sensitized solar cells decreased in the order 2 > 1 > 3 with the increase in the dark current resulting from reverse electron transfer from TiO(2) to I(3)(-). The sensitizer-dependent V(oc) value can be interpreted as a result of reverse electron transfer through the sensitizing dye molecules. |
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Authors:
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Masatoshi Yanagida; Takeshi Yamaguchi; Mitsuhiko Kurashige; Kohjiro Hara; Ryuzi Katoh; Hideki Sugihara; Hironori Arakawa |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Inorganic chemistry Volume: 42 ISSN: 0020-1669 ISO Abbreviation: Inorg Chem Publication Date: 2003 Dec |
Date Detail:
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Created Date: 2003-11-24 Completed Date: 2004-03-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0366543 Medline TA: Inorg Chem Country: United States |
Other Details:
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Languages: eng Pagination: 7921-31 Citation Subset: - |
Affiliation:
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Photoreaction Control Research Center, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, AIST-Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan. |
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