Strategies for Optimizing the Performance of Cyclometalated Ruthenium Sensitizers for Dye-Sensitized Solar Cells

被引：79

作者：

Bomben, Paolo G. ^{[1
]}

Theriault, Kim D. ^{[1
]}

Berlinguette, Curtis P. ^{[1
]}

机构：

[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2011年 / 11期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

Ruthenium; Electrochemistry; Dyes; Sensitizers; Solar cells; CHARGE-TRANSFER; ELECTRON-TRANSFER; COMPLEXES; ENERGY; LIGHT; ABSORPTIVITY; DONOR; BIS(DICARBOLLIDE); ELECTROABSORPTION; RECOMBINATION;

D O I：

10.1002/ejic.201001345

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Pursuant to our goal of optimizing the performance of cyclometalated Ru sensitizers in the dye-sensitized solar cell (DSSC), the physicochemical properties of a series of tris-heteroleptic Ru-II complexes are reported. Each of these complexes contains a metal ligated by: (i) a bidentate 2,2'-bipyridine-4,4'-dicarboxylic acid (dcbpy) ligand to anchor the dye to the TiO2 surface; (ii) a cyclometalating ligand - with electron-withdrawing groups to ensure a sufficiently high oxidation potential for dye regeneration in the DSSC; and (iii) a 2,2'-bipyridine (bpy) ligand. UV/Vis and electrochemical data reveal that each complex exhibits broad metal-to-ligand charge transfer (MLCT) bands of significant intensity (epsilon = 1.0-2.3 x 10(4)M(-1)cm(-1)) in the visible region, and ground- and excited-state redox potentials that are appropriate for sensitizing TiO2. Analysis of the dyes in the DSSC highlights the sensitivity of cell performance to the oxidation potential for each of the dyes, which has important implications in the development of cyclometalated Ru sensitizers.

引用

页码：1806 / 1814

页数：9

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