Homoleptic ruthenium complex bearing dissymmetrical 4-carboxy-4'-pyrrolo-2,2'-bipyridine for efficient sensitization of TiO(2) in solar cells

Arnald Grabulosa; Marc Beley; Philippe C Gros; Silvia Cazzanti; Stefano Caramori; Carlo A Bignozzi

doi:10.1021/ic9009256

Homoleptic ruthenium complex bearing dissymmetrical 4-carboxy-4'-pyrrolo-2,2'-bipyridine for efficient sensitization of TiO(2) in solar cells

Inorg Chem. 2009 Aug 17;48(16):8030-6. doi: 10.1021/ic9009256.

Authors

Arnald Grabulosa¹, Marc Beley, Philippe C Gros, Silvia Cazzanti, Stefano Caramori, Carlo A Bignozzi

Affiliation

¹ SRSMC, Nancy Université, CNRS, Faculté des Sciences, Boulevard des Aiguillettes, F-54506 Vandoeuvre-Lès-Nancy, France.

PMID: 19610621
DOI: 10.1021/ic9009256

Abstract

An easily accessible homoleptic complex [Ru(L3)(3)](2+) containing a dissymmetrical bipyridine (L3) 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.