Highly efficient polypyridyl-ruthenium(II) photosensitizers with chelating oxygen donor ligands:: β-diketonato-bis(dicarboxybipyridine)ruthenium

被引：49

作者：

Takahashi, Y ^{[1
]}

Arakawa, H ^{[1
]}

Sugihara, H ^{[1
]}

Hara, K ^{[1
]}

Islam, A ^{[1
]}

Katoh, R ^{[1
]}

Tachibana, Y ^{[1
]}

Yanagida, M ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan

来源：

INORGANICA CHIMICA ACTA | 2000年 / 310卷 / 02期

关键词：

photosensitizer; ruthenium complexes; beta-diketonate; solar cell;

D O I：

10.1016/S0020-1693(00)00279-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of mono-cationic polypyridyl-ruthenium complexes with strongly electron donating beta -diketonate ligands {(dcbp)(2)Ru(L)}Cl, where dcbp = 4,4'-dicarboxy-2,2'-bipyridine; L = acetylacetonate (1), 3-methyl-2,4-pentanedionate (2), 1,3-diphenyl-1,3-propanedionate (3), have been synthesized as molecular photosensitizers for a nanocrystalline TiO2 electrode. In alkaline methanol solution, these complexes exhibit intense visible light absorption with low energy MLCT maxima above 517 nm which accompany a significantly enhanced band tail, improving red light absorptivity beyond 600 nm. The photoelectrochemical properties of these three diketonate complexes on a TiO2 semiconductor have been compared to cis-dithiocyanate complex, (dcbp)(2)Ru(NCS)(2), which is one of the most efficient sensitizers reported to date. The diketonate complexes show quite high performances in photoelectrochemical cells containing I-/I-3(-) electrolyte. The overall solar light-to-electrical energy conversion efficiencies are in the range of 6.0-3.9% while the dithiocyanate complex yields 5.7% efficiency in our experiments. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：169 / 174

页数：6

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