Effect of post-deposition annealing on some optical properties of thermally-evaporated V _2O _5 thin film

摘要

A vanadium pentoxide sample with a film thickness of 75 nm has been thermally evaporated on unheated glass substrate using V _2O _5 high purity powder. The sample was subjected to a subsequent post-deposition annealing in air at different temperatures for a period of one hour. The optical properties were studied by transmittance and reflectance measurements. The integrated visible TVis, and solar, TSol, transmittance were calculated. The spectral behaviour of the refractive index as well as the absorption coefficient before and after post-deposition heat-treatment was also reported. X-ray diffraction confirmed that the film in the as-deposited as well as after annealing up to 400 °C is in the amorphous state.