Homoleptic Ruthenium Complex Bearing Dissymmetrical 4-Carboxy-4′-pyrrolo-2,2′-bipyridine for Efficient Sensitization of TiO<sub>2</sub> in Solar Cells
作者:Arnald Grabulosa、Marc Beley、Philippe C. Gros、Silvia Cazzanti、Stefano Caramori、Carlo A. Bignozzi
DOI:10.1021/ic9009256
日期:2009.8.17
An easily accessible homoleptic complex [Ru(L3)(3)](2+) containing a dissymmetrical bipyridine (1-3) substituted by a pyrrole and a carboxylic group has been evaluated in a dye-sensitized solar cell. The new dye displayed extended absorption domain, high absorbance, and a promising 65% IPCE value. Higher scores were reached using a cobalt-iron mediator instead of the usual LiI/I-2 couple for regeneration of the Ru-II state. Transient absorption spectroscopy was used to explain the mediator effect.