Abstract
The sensitization caused by the adsorption of a ruthenium complex in a niobium thin film (d < 300 nm) was analysed by photoelectrochemical measurements. The films were coated on a indium-tin-oxide (ITO) conductor glass by a dip-coating technique. The non-sensitized film had only photoelectrochemical current in the UV region (i ≤ 40 nA). The sensitization of the film by cis-dithiocyanate (2,2-bipyridyl-4,4′dicarboxylic acid) ruthenium(II) complex altered the shape of the non-normalized action spectrum with the presence of photoelectrochemical current in the visible range (λ ≥ 400 nm). This photoelectrochemical current (i ≤ 70 nA) was associated with electron injection into the niobium pentoxide conduction band due to metal-to-ligand charge-transfer (MLCT) of the ruthenium complex. The shape of the action spectrum in the UV range (λ ≤ 400 nm) changed with the application of an electric potential to the film surface and the photoelectrochemical current associated with the ligand-to-metal charge transfer of niobia film decreased for higher ruthenium concentration.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. Juris, V. Balzani, F. Barigelletti, S. Campagna, P. Belser, and A. Von Zelewsky, Ruthenium(II) polypiridine complexes: photophysics, photochemistry, electrochemistry and chemiluminescence, Coordination Chemistry Reviews 84, 85 (1988).
J. Desilvestro, M. Grätzel, and L. Kavan, Journal of the American Chemical Society 107(10), 2988 (1985).
C.A. Bignozzi, R. Argazzi, M.T. Indelli, and F. Scandola, Solar Energy Materials and Solar Cells 32, 229 (1994).
P.V. Kamat, Chemtech 22, 22–28 (1995).
M. Grätzel, MRS Bulletin XVIII(10), 61 (1993).
B. O' Regan and M. Grätzel, Nature 353, 737 (1991).
M.K. Nazeeruddin, A. Kay, I. Rodicio, R. Humphry-Baker, E. Müller, P. Liska, N. Vlachopoulos, and M. Grätzel, Journal of the American Chemical Society 115(4), 6382 (1993).
F. Di Quartzo, S. Piazza, R. D'Agostino, and C. Sunseri, Journal of Electroanalytical Chemistry 228, 119 (1987).
P. Clechet, J.R. Martin, R. Olier, and C. Vallouy, C.R. Acad. Sci. Paris 282, Série C, 887 (1976).
H. Schafer, R. Gruehn, and F. Schulte, Angew. Chem. Internat, Edit. 5(1), 40 (1966).
C.V. D'Alkaine, L.M.M. De Souza, and F.C. Nart, Corrosion Science 34, 109 (1993).
L. Hu, W. Marcus, M. Grätzel, and Z. Jiang, Journal of Sol-Gel Science and Technology 5(3), 219 (1995).
D.F. Schriver, The Manipulation of Air-Sensitive Compounds (McGraw Hill, New York, 1969).
D.C. Bradley, B.N. Chakravarti, and W. Wardlaw, Journal of Chemical Society 3, 2381 (1956).
P. Liska, N. Vlachopoulos, M.K. Nazeeruddin, P. Comte, and M. Grätzel, Journal of American Chemical Society 110, 3686 (1988).
J.M. Shreeve, in Inorganic Synthesis: cis-bis(2,2'-bipyridinen, n')dichlororuthenium(II)dihydrate, cis-Ru(bpy) 2 Cl 2.2H 2 O. (John Wiley & Sons, New York), Vol. 24, p. 292.
A. Hagfeldt, U. Bjrkstén, and S.E. Lindquist, Solar Energy Materials and Solar Cells 27, 293 (1992).
S. Södergren, A. Hagfeldt, J. Olsson, and S.E. Lindquist, The Journal of Physical Chemistry 98(21), 5552 (1994).
D.A. Barros Filho, P.P. Abreu Filho, U. Werner, and M.A. Aegerter, Journal of Sol-Gel Science and Technology 8, 735 (1997).
D.A. Barros Filho, P.P. Abreu Filho, O.L. Alves, and D.W. Franco, Journal of Materials Science 33, 2607–2616 (1998).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Barros Filho, D.D.A., Abreu Filho, P.P., Alves, O.L. et al. Sensitization of Niobium Pentoxide Thin Films by cis-Dithiocyanate (2,2-bipyridyl-4,4′dicarboxylic acid) Ruthenium(II) Complex. Journal of Sol-Gel Science and Technology 18, 259–267 (2000). https://doi.org/10.1023/A:1008752124254
Issue Date:
DOI: https://doi.org/10.1023/A:1008752124254