Artículos de revistas
Sensitization Of Niobium Pentoxide Thin Films By Cis-dithiocyanate (2,2-bipyridyl-4,4′dicarboxylic Acid) Ruthenium(ii) Complex
Registro en:
Journal Of Sol-gel Science And Technology. Kluwer Academic Publishers, Dordrecht, Netherlands, v. 18, n. 3, p. 259 - 267, 2000.
9280707
10.1023/A:1008752124254
2-s2.0-0034240693
Autor
Barros Filho D.D.A.
Abreu Filho P.P.
Alves O.L.
Franco D.W.
Institución
Resumen
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-ligand-to-metal charge transfer of niobia film decreased for higher ruthenium concentration. 18 3 259 267 Juris, A., Balzani, V., Barigelletti, F., Campagna, S., Belser, P., Von Zelewsky, A., (1988) Ruthenium(II) Polypiridine Complexes: Photophysics, Photochemistry, Electrochemistry and Chemiluminescence, 84, p. 85. , Coordination Chemistry Reviews Desilvestro, J., Grätzel, M., Kavan, L., (1985) Journal of the American Chemical Society, 107 (10), p. 2988 Bignozzi, C.A., Argazzi, R., Indelli, M.T., Scandola, F., (1994) Solar Energy Materials and Solar Cells, 32, p. 229 Kamat, P.V., (1995) Chemtech, 22, pp. 22-28 Grätzel, M., (1993) MRS Bulletin, 18 (10), p. 61 O'Regan, B., Grätzel, M., (1991) Nature, 353, p. 737 Nazeeruddin, M.K., Kay, A., Rodicio, I., Humphry-Baker, R., Müller, E., Liska, P., Vlachopoulos, N., Grätzel, M., (1993) Journal of the American Chemical Society, 115 (4), p. 6382 Di Quartzo, F., Piazza, S., D'Agostino, R., Sunseri, C., (1987) Journal of Electroanalytical Chemistry, 228, p. 119 Clechet, P., Martin, J.R., Olier, R., Vallouy, C., (1976) C.R. Acad. Sci. Paris, 282, p. 887. , Série C Schafer, H., Gruehn, R., Schulte, F., (1966) Angew. Chem. Internat, Edit., 5 (1), p. 40 D'Alkaine, C.V., De Souza, L.M.M., Nart, F.C., (1993) Corrosion Science, 34, p. 109 Hu, L., Marcus, W., Grätzel, M., Jiang, Z., (1995) Journal of Sol-Gel Science and Technology, 5 (3), p. 219 Schriver, D.F., (1969) The Manipulation of Air-Sensitive Compounds, , McGraw Hill, New York Bradley, D.C., Chakravarti, B.N., Wardlaw, W., (1956) Journal of Chemical Society, 3, p. 2381 Liska, P., Vlachopoulos, N., Nazeeruddin, M.K., Comte, P., Grätzel, M., (1988) Journal of American Chemical Society, 110, p. 3686 Shreeve, J.M., Inorganic Synthesis: Cis-bis(2,2′-bipyridine-n,n′)dichlororuthenium(II)dihydrate, Cis-Ru(bpy)2Cl2·2H2O., 24, p. 292. , (John Wiley & Sons, New York) Hagfeldt, A., Björkstén, U., Lindquist, S.E., (1992) Solar Energy Materials and Solar Cells, 27, p. 293 Södergren, S., Hagfeldt, A., Olsson, J., Lindquist, S.E., (1994) The Journal of Physical Chemistry, 98 (21), p. 5552 Barros Filho, D.A., Abreu P.P. Filho, Werner, U., Aegerter, M.A., (1997) Journal of Sol-Gel Science and Technology, 8, p. 735 Barros Filho, D.A., Abreu P.P. Filho, Alves, O.L., Franco, D.W., (1998) Journal of Materials Science, 33, pp. 2607-2616