Particle size and crystallinity dependent electron injection in fluorescein 27-sensitized TiO2 films

Article Abstract:

The influence of processing parameters, such as autoclaving and firing temperatures, on the optical properties of nanocrystalline anatase TiO2, film and on the process of electron injection from the dye fluorescein 27 to the as-prepared films is studied. Transmission electron microscopy and steady-state and time-resolved femtosecond spectroscopy measurements indicated that the larger TiO2 particle and the better its overall crystallinity, the faster the process of electron injection.

Usage, Titanium dioxide, Transmission electron microscopes

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Electron injection and recombination in Fluorescein 27-sensitized TiO2 thin films

Article Abstract:

Electron injection and recombination dynamics of the dye Fluorescein 27 adsorbed to a nanocrystalline titanium dioxide (TiO2) thin film in acetonitrile (CH3CN) by femtosecond pump-probe spectroscopy is examined. After excitation of the dye at the adsorption maximum, transient absorption spectra and kinetics were recorded in the spectral region between 400-2000 nm.

Electric properties, Oxides, Titanium

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Photoinduced ultrafast dynamics of Ru(dcbpy)(sub 2)-sensitized nanocrystalline TiO(sub 2) films: the influence of sample preparation and experimental conditions

Article Abstract:

Pump photon density, environment of the sensitized film and parameters of the film preparation are varied in a systematic way and the obtained dynamics are compared to that of a well-defined reference sample. Reducing the firing temperature of the nanocrystalline of the film via electronic beam evaporation resulted in a decrease of crystallinity of the film.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Ruthenium, Nanotechnology, Photons

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