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