Highly efficient photosensitization of TiO2 with diimine(diketonato)ruthenium(II) complexes

被引：23

作者：

Sugihara, H

Sano, S

Yamaguchi, T

Yanagida, M

Sato, T

Abe, Y

Nagao, Y

Arakawa, H

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, Tsukuba, Ibaraki 3058565, Japan

[2] Sci Univ Tokyo, Fac Sci & Technol, Noda, Chiba 2788514, Japan

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2004年 / 166卷 / 1-3期

关键词：

solar cells; ruthenium(II) complexes; photosensitizers; density functional theory; INDO/S; beta-diketonate;

D O I：

10.1016/j.jphotochem.2004.04.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diimine ruthenium(II) complexes with beta-diketonate ligands were synthesized. Photophysical and electrochemical properties of these complexes were investigated. The electron-donating strength of beta-diketonate can be tuned by choosing alkyl substitutents of the diketones. The complexes examined showed excellent photosensitization ability toward TiO2. The photoelectrochemical cell sensitized with [Ru(dcbpy)(2)(dpmo)]Cl (dpmo = dipivaloylmethanato) showed a solar light-to-electricity conversion efficiency of 6.9%. Electronic absorption spectra of the complexes were assigned by a computational calculation of molecular orbital. Transition from HOMO - 2 to the LUMO and LUMO + 2, which come from diketonate ligand, play an important role for absorption spectra in the longer wavelength response. (C)2004 Elsevier B.V. All rights reserved.

引用

页码：81 / 90

页数：10

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