WO3 electrochromic film for smart window can be produced by various preparation methods, such as electrophoretic deposition and sol-impregnation. Some experts have adopted these two methods to prepare tungsten oxide electrochromic films with different electrochromic properties.

WO3 electrochromic film for energy-saving glass is an electrochromic material that has characteristics of good ionic and electronic conductivity, high contrast, color change efficiency, cycle period, writing/wiping efficiency and other electrochromic properties. And it is also well known as a functional material.

WO3 electrochromic film for smart glass can be prepared by a sol-gel method. For example, experts use tungstate as a raw material to prepare tungsten oxide electrochromic thin film with nanostructure on a ceramic substrate by sol-gel method. The experts also adjusted the parameters of different links in the process to observe the effect of parameter changes on the process results. Experts also applied positive and negative voltages to the electrochromic thin film electrodes to verify and test their electrochromic properties.

WO3 electrochromic film for electrochromic smart window can be prepared by electrophoretic deposition. There are more explorations in preparation of tungsten trioxide electrochromic thin films by electrophoretic deposition abroad. And there are relatively rare related research done in China.