Tungsten trioxide electrochromic film for smart window can be prepared by magnetron sputtering method. You may know that magnetron sputtering method is a multi-field film preparation method that is easy to be used in the laboratory for study and is also suitable for large-scale production. But do you know the basic method of preparing WO3 electrochromic thin film by magnetron sputtering?

A smart window, which is assembled using WO3 electrochromic thin film as the electrochromic layer material, can control the transmittance of visible light and therefore prevent the solar radiation from entering into the building. Also, such window can obtain different transmittance depending on the dynamic demand of human comfort. In other words, people can dynamically adjust the heat insulation effect of such smart windows.

Tungsten trioxide film is often used to assemble a smart window - a new type of energy-saving window with the advantages of high heat insulation, energy conservation and environmental protection. That is because WO3 electrochromic film has better electrochromic effect, and it is even better than oxides such as Ni, Mo, Nb, Ir, etc. Therefore, the WO3 powder and the WO3 film have been given the greatest attention. So, how to prepare WO3 electrochromic film? It is reported that the tungsten trioxide electrochromic film can be prepared by anodic oxidation method.

Tungsten oxide powder for producing liquid electrochromic device is an electrochromic material, more specifically, an inorganic electrochromic material. And usually tungsten trioxide film rather than tungsten trioxide powder is used to assemble an electrochromic device. In fact, the electrochromic material can be further divided into a cathode electrochromic material and an anode electrochromic material in accordance with the coloring method. And tungsten oxide belongs to the cathode electrochromic material.