Study on optical switching and color changing properties of the W-doped VO2 films on muscovite substrate

W-doped vanadium dioxide films were fabricated on muscovite using inorganic sol-gel method. XRD, SEM, FTIR and color difference (ΔE*) were used to analyze the microstructure, morphology, optical switching and color changing properties of the W-doped vanadium dioxide films. The results suggested that the phase transition temperature was decresed to room temperature and the films showed excellent optical switching property with the temperature as well. The color of films was changed, the maximum of color difference was 5.9 during the film metal-insulator transition.