Violet tungsten oxide can serve as a cathode electrochromic material - one of electrochromic materials. The other type is an anode electrochromic material. When the electrochromic material is at the cathode and is colored, it is called cathodic coloring, and its electrochemical reaction formula is:

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.

Violet tungsten oxide has photochromic properties so that it may be used to prepare a high performance photochromic thin film, that is, a heat insulating film, more specifically, a highly transparent thermal insulating film. According to the principle of photochromism, the thermal insulation film undergoes a color change reaction under the condition of light, and changes from colorless to blue, and has a good shielding effect on light intensity and ultraviolet light.

Violet tungsten oxide, like tungsten trioxide, has good electrochromic properties, so it may be used to prepare an environmentally friendly electrochromic thin film for applying in smart windows for the purpose of thermal insulation, heat preservation and energy conservation. From a professional point of view, this is because the architectural glass applying with the tungsten oxide electrochromic film has the adjustability of light absorption and transmission under the electric field, which can effectively control the external heat radiation and internal heat diffusion, and reduce the building energy consumption. Therefore, it has a huge market prospect.