Particle Size and Crystallinity Dependent Electron Injection in Fluorescein 27-Sensitized TiO2 Films
Influence of processing parameters, such as autoclaving and firing temp., on the optical properties of nanocryst. anatase TiO2 film and on the process of electron injection from the dye fluorescein 27 to the as-prepd. films is studied. TEM and steady-state and time-resolved femtosecond spectroscopy measurements indicate that the larger the TiO2 particle and the better its overall crystallinity, the faster the process of electron injection. Unraveling factors that control the properties of the sub-20-nm sized semiconductor particles, and by this the electron injection to them, is important for understanding the process of interfacial electron transfer from the dye to the semiconductor, as well as future optimization of the function of the photoelectrochem. cell based on dye-sensitized TiO2 films.
Keywords: interface electron transfer titania anatase sensitization fluorescein27 ; photoelectrochem cell titania anatase sensitization fluorescein27 electron injection ; TEM titania anatase sensitization fluorescein27 film ; titania anatase sensitization fluorescein27 electron injection particle size crystallinity ; UV visible spectra titania anatase sensitization fluorescein27 electron injection
Record created on 2015-07-06, modified on 2016-10-01