Influence of Bismuth Dopant on Physical Properties of nanostructured TiO2Thin Films

Abstract

Nano structured TiO2 was prepared utilizing spray pyrolysis deposition (SPD). The characterization of the deposited films was studied with Bi dopant.  The XRD analysis indicated that films are polycrystalline with a preferred orientation along (110) direction. The AFM analysis shows a porous morphology structure. The optical properties were obtained by UV–visible spectro photometer, which show that these films were highly transparent above 80% at the wavelength more than 700 nm with a slightly  influenced upon Bi content. The energy gap was shifted from 3.1to 2.6 eV, versus doping.