期刊
CHEMICAL PHYSICS LETTERS
卷 340, 期 3-4, 页码 217-221出版社
ELSEVIER
DOI: 10.1016/S0009-2614(01)00398-0
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We have measured dynamics of the Ru(dcbpy)(2) (NCS)(2) [dcbpy = 4,4'-dicarboxy-2,2'-bipyridine] excited state and the dye cation on nanocrystalline TiO2 film in the wavelength region 700-900 nm. The dye in ethanol solution and Ru(dcbpy),(NCS), sensitized nanocrystalline Al2O3 films were used as non-injecting reference samples for excited state identification. For TiO2/Ru(dcbpy)(2)(NCS)(2) film the 'reactant' decay and 'product' formation kinetics observed at different probe wavelengths showed that the resolved transient absorption picosecond components (1.1 +/- 0.2), (12 +/- 2) and (100 +/- 5) ps are related to electron injection from the excited states of the dye to the semiconductor TiO2. (C) 2001 Elsevier Science B.V. All rights reserved.
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