Functionalising nanocrystalline TiO2 films: dye sensitised solar cells andoptical biosensors

The fabrication of porous, nanocrystalline titanium dioxide (TiO2) films is considered first, and their application as dye sensitised photovoltaic dev ices is summarised, The electron transfer and transport dynamics within suc h devices is then discussed in more detail, focusing on electron transfer b etween the TiO2 and the molecular dyes, and the role of intra band trap sta tes in the TiO2, The authors conclude by introducing a new potential applic ation of such nanocrystalline TiO2 films, as a substrate for enzyme inmobil isation in bioanalytical devices. MST/4786.