Electrochemical studies of the Co(III)/Co(II)(dbbip)2 redox couple as a mediator for dye-sensitized nanocrystalline solar cells

被引:169
作者
Cameron, PJ
Peter, LM [1 ]
Zakeeruddin, SM
Grätzel, M
机构
[1] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England
[2] Swiss Fed Inst Technol, Lab Photon & Interfaces, CH-1055 Lausanne, Switzerland
关键词
cobalt; dye-sensitized; solar cell; titanium dioxide;
D O I
10.1016/j.ccr.2004.02.010
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The electrochemical properties of the redox mediator Co(III)/Co(II)(dbbip)(2) (dbbip = 2,6-bis(1'-butylbenzimidazol-2'-yl)pyridine) in a mixed acetonitrile/ethylene carbonate solvent have been studied by a range of techniques in order to determine the rate constants for electron transfer and the diffusion coefficients of the Co(II) and Co(III) species. Platinum, gold, fluorine-doped tin oxide (FTO) and compact TiO2 layers were used as electrode materials. The results have been used to predict the limitations imposed on the performance of dye-sensitized nanocrystalline cells by the electron transfer kinetics and mass transport properties of the redox mediator. The Co(III)/Co(II) redox mediator is compared with the conventional triiodide/iodide redox system used in high performance dye-sensitized solar cells. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:1447 / 1453
页数:7
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