Violet tungsten oxide, like yellow tungsten oxide or tungsten trioxide, is an electrochromic material that may be used to produce electrochromic devices, such as smart windows. For electrochromic materials, experts have introduced the rich colors that the film has in the process of coloring.
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Experts say that when different electrochromic materials are colored, the color of the film varies. For example, a tungsten trioxide film is colored from colorless to light blue to a final blue color. While vanadium pentoxide is changed from yellow to green. The mixed oxide of the electrochromic material can also form a variety of colors different from the monomer. For example, the color of the mixed film of WO3:MoO3 changes with the amount of molybdenum doped. When the weight ratio of tungsten to molybdenum oxide is 60:40, the film is black when it is colored. Therefore, electrochromic materials also have decorative aesthetic effects.
