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Dye-sensitized photoelectrochemical cells based on TiO2 mesoporous films, a ruthenium bipyridyl derivative as photosensitizer and a SiO2/poly(ethylene glycol)-200 nanocomposite thin film as electrolytesupport, have been constructed. TiO2 films have been deposited on conductive transparent Indium-Tin Oxide glass slides by means of a sol-gel procedure carried out in reverse-micellar solutions. The photosensitizerhas been adsorbed on titania films from ethanolic solutions while the electrolyte layer has beensynthesized by a sol-gel procedure. The presence of silica in the nanocomposite electrolyte gel provides thegelifying agent, the compound that holds the cell together in a sandwich form and the sealing agent thatprotects the cell and secures its long-term function. PEG-200 makes the organic subphase which providesthe ionic conductivity. The present work describes the construction of the cell and the study of its efficiency.A variant of the cell has also been made by incorporating Ag+ and Ru3+ ions into titania particles, but thesedopants did not improve cell efficiency, either in their oxidized or in their reduced form

Organic/inorganic nanocomposite gels employed as electrolyte supports in Dye-sensitized Photoelectrochemical cells