title: Homoleptic ruthenium complex bearing dissymmetrical 4-carboxy-4'-pyrrolo-2,2'-bipyridine for efficient sensitization of TiO(2) in solar cells.
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.
authors.affiliation: SRSMC, Nancy Université, CNRS, Faculté des Sciences, Boulevard des Aiguillettes, F-54506 Vandoeuvre-Lès-Nancy, France.
authors.forename: Arnald
authors.initials: A
authors.lastname: Grabulosa
authors.forename: Marc
authors.initials: M
authors.lastname: Beley
authors.forename: Philippe C
authors.initials: PC
authors.lastname: Gros
authors.forename: Silvia
authors.initials: S
authors.lastname: Cazzanti
authors.forename: Stefano
authors.initials: S
authors.lastname: Caramori
authors.forename: Carlo A
authors.initials: CA
authors.lastname: Bignozzi