Effect of Doping Lead on Optical and Structural Properties of Thin Films of TiO2

Abstract

The present paper reports on the structural and optical properties of 5% Pb-doped TiO2 thin films deposited on glass and silicon substrates prepared by the sol-gel technique have been investigated. Dip-coated thin films have been examined at different annealing temperatures (400-500 °C). The results shows that Pb-doped TiO2 thin films start to crystallize at low temperature (400 °C). The morphology and surface structure of the films were studied by SEM reveals a nanoporous structure of anatase with particle sizes ranging between 20 nm and 100 nm. UV-visible and SE spectroscopy study permits to determine the annealing temperature effect on the optical properties and the optical gap of the TiO2 doped Pb thin films. These results improve that the properties of thin films of TiO2 enhanced by lead doping which increase the photo activity of films