Yellow tungsten oxide electrochromic film, or tungsten trioxide film, can be used to assemble a smart glass, which is also known as an energy-saving glass - a development direction of energy-saving building materials. So, what are the advantages of tungsten trioxide electrochromic glass?

Tungsten trioxide film for smart glass can be prepared by a hydrothermal method. In this process, the WO3 seed layer should be prepared before the preparation of WO3 electrochromic film. But how to prepare WO3 seed layer?

WO3 film for preparing large area electrochromic device is a typical representative of the earliest and the most studied cathode electrochromic materials. However, due to the complexity of the electrochromic process of tungsten trioxide, its mechanism remains controversial. Currently, the widely accepted and applied electrochromic model is the dual injection model, which is also known as the Fanghnan model.

Tungsten oxide film, as a typical cathode electrochromic material, has been widely studied as it has the advantages of large light modulation range, high color change efficiency and good cycle reversibility so that it can be used to prepare a large area electrochromic device. And the prepared electrochromic device can be used in the field of building for achieving the purpose of heat insulation and energy conservation. In recent years, as a new energy-saving material, WO3 electrochromic film has received more and more attention. So, how to prepare WO3 electrochromic material?