Influence of ZnFe 2 O 4 doping on the structural and optical properties of TiO 2 films

Abstract

Amorphous TiO 2 thin films with and without the doping of ZnFe 2 O 4 were prepared by radio frequency magnetron sputtering. The influence of post-deposition annealing on the structural and optical properties was studied. It was established that the anatase single phase exists between 250 degree(s)C and 800 degree(s)C in the TiO 2 thin films, and between 450 degree(s)C and 650 degree(s)C in the TiO 2 thin films with 2 wt% doping of ZnFe 2 O 4 . The absorption edge of TiO 2 thin films with and without doping exhibits a blue shift with decreasing annealing temperature and the absorption edge of TiO 2 doped with ZnFe 2 O 4 has moved to visible spectrum range. The enhanced photoluminescence of the TiO 2 films doped with ZnFe 2 O 4 was found in comparison with pure TiO 2 thin films at room temperature.