Tungsten oxide nano film is one of the most studied and used electrochromic layer materials that can be used to assemble an electrochromic device. According to experts, electrochromic devices can be considered as electrochemical cells. And they are structurally sandwich-type multilayer electrochemical devices. Such a device consists mainly of three parts, the working electrode, the electrolyte and the counter electrode. Wherein each layer appears in the form of a film. The thickness of each layer of film depends on specific requirements.

Mo-doped tungsten oxide heat insulating film can be prepared by spraying. It is reported that the spraying method is a method of coating the surface of a film substrate. So, how to obtain a Mo doped tungsten oxide film by spraying? Apply the nano slurry of Mo doped tungsten oxide fine particles containing infrared absorbing material particles to the surface of the film substrate uniformly.

Tungsten oxide has excellent optical properties, so it may be used to produce a transparent heat insulating window film with high infrared shielding performance and high visible light transmittance. The infrared shielding rate of such a heat insulation film can reach more than 95%, and the visible light transmittance can be above 80%. That is to say, building glasses applying with such thermal insulation films can achieve ideal heat insulation and heat preservation effect, thereby saving energy.

Tungsten oxide has excellent performance of shielding near-infrared rays and ultraviolet rays, and therefore it may be used to produce smart window film. In the hot summer, heat of the sun can easily enter the car through car window glass, and natural temperature inside the car can quickly reach 70 °C or above. In addition to the extremely uncomfortable burning sensation, it will also accelerate the aging of interior items. On rainy days, the side and rear mirrors are shrouded by rain and mist, which may affect driving safety.

Tungsten oxide has a strong absorption capacity for electromagnetic waves so that it can be used as an excellent solar absorbing material. For example, it may be used to produce building thermal insulating glass. And the prepared glass has the properties of heat insulation and heat preservation. Also, it is waterproof, moisture proof and anti-glare. And that is because the tungsten oxide nanopowder has many properties such as good shielding performance to near infrared rays and ultraviolet rays.

Tungsten oxide may be applied to automotive glass in the form of heat-insulating film or heat-insulating coating, and finally car thermal insulation glass with good heat insulation and heat preservation performance may be prepared. As we all know, automotive glass has the front windshield, rear windshield and the side windshield.

A tungsten oxide electrochromic film composed of tungsten oxide powder can be used to assemble an electrochromic glass - a smart heat insulation window glass. According to experts, such heat insulation glass has five thin film layers sandwiched between two layers of glass. And the five-layer contains a transparent conductive layer, an electrochromic layer, an ion conducting layer (electrolyte layer), an ion storage layer, and another transparent conductive layer. So, do you know what the electrochromic mechanism of tungsten oxide heat insulating glass is?

The discoloration process of tungsten oxide for preparing smart heat insulation film is more complicated, and the mechanism is still controversial. Currently, the widely accepted and applied discoloration model is the dual injection model, namely the Fanghnan model.

Nano tungsten oxide is an important raw material for preparing large area electrochromic device. As you may have known, whether the discoloration is uniform or not will affect the electrochromic performance of the prepared device, so a device with discoloration uniformity is an ideal device. In fact, large-area electrochromic devices may exhibit discoloration unevenness. So, how to solve the problem of uneven discoloration of large-area electrochromic devices of tungsten oxide? Experts propose the following options:

Tungsten oxide film is an important electrochromic material. And WO3 film is also one of the most studied electrochromic materials. But do you know why WO3 electrochromic film is the most popular electrochromic material?