WO3 powder can be used to make WO3 film, and then be used to produce a new electrochromic device that has been popular in the past, that is, an smart window, which is also known as an energy-saving window. It is the smart device in the home that is becoming the norm. Wherein, tungsten trioxide can be made into two types of films including crystalline tungsten trioxide film and amorphous tungsten trioxide film. So, what is the difference between the two films?

Yellow tungsten oxide powder can be made into an electrochromic film and then be used to produce a new electrochromic device. Experts say that so far, the discoloration mechanism of WO3 film is still not clear, so it is usually explained by one of these models including Deb model, Schirmer model and inter-valence charge transfer model. Among them, the Schirmer model is also called the small polaron model, and the inter-valence charge transfer model is also called the Fanghnan model or the double injection/extraction model.

Tungsten trioxide powder may be prepared into an electrochromic film and then be applied for preparing a new electrochromic device such as a smart glass, that is, an energy-saving glass. According to experts, the tungsten trioxide smart glass is a multi-layered device that is then laminated onto glass. When an electrical charge is delivered to the glass, it tints, shading occupants against sun or heat. When the voltage is reversed, the glass will clear.

Tungsten oxide powder can be first prepared into a film and then used to prepare a new electrochromic device. Wherein, the tungsten oxide film can be an amorphous tungsten oxide film and a crystalline tungsten oxide film. Some experts believed that the tungsten oxide film with a crystalline structure has a better discoloration effect as it is more advantageous to transport ions at the edge of the grain relaxation.