Structural and characteraization of WO3 thin films prepared by sol-gel method

in this study WO3 thin films prepared by sol gel method at 250 and 450°C. these films were characterized by XRD, SEM and spectrophotometry analysis. The film were annealed at 250°C was amorphous and high temperature annealing crystallizes them. According to the scanning electron microscopy (SEM) image, the films annealed at 250˚C were dense. Moreover, the particles were uniformly distributed on them. The samples annealed at 250˚C represent the maximum transmission at a wavelength of 400 nm, having a good blue color. The samples' transmittances decreased as the annealing temperature increased.

Keywords:

Electrochrimic , sol gel , WO3 , thin film