New dinuclear hydrido-carbonyl rhenium complexes designed as photosensitizers in dye-sensitized solar cells
Articolo
Data di Pubblicazione:
2016
Citazione:
New dinuclear hydrido-carbonyl rhenium complexes designed as photosensitizers in dye-sensitized solar cells / L. Veronese, E.Q. Procopio, F. De Rossi, T.M. Brown, P. Mercandelli, P. Mussini, G. D’Alfonso, M. Panigati. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - 40(2016), pp. 2910-2919.
Abstract:
The possible use of some dinuclear rhenium complexes as sensitizers for dye sensitized solar cells
(DSSCs) has been investigated. They have general formula [Re2(m-X)(m-Y)(CO)6(m-pyridazine-4-COOH)],
with X = Y = Cl (1), X = H, Y = benzoato (2), and X = H, Y = 4-diphenylaminobenzoato (3). An original
synthetic strategy has been set for preparing the hydrido-carboxylato derivatives 2 and 3. They have
been indicated by DFT and TD-DFT computations as the most promising dyes, endowed with good light
harvesting capability. The complexes have absorption maxima in the range of 405–443 nm, on TiO2
films, arising from metal-to-ligand-charge transfer transitions. Cyclic voltammetry experiments have
been performed on the derivatives containing the methyl ester of the pyridazine-4-COOH acid, showing
electrochemical band gaps in the range of 2.25–1.63 eV. The best DSSC results have been obtained
using complex 3, with an overall solar-to-electric conversion efficiency of 1.0%. Noteworthy the
presence of a hydrido ligand did not show any detrimental effect on the stability of the sensitizers under
the operating conditions.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
L. Veronese, E.Q. Procopio, F. De Rossi, T.M. Brown, P. Mercandelli, P. Mussini, G. D’Alfonso, M. Panigati
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