The electrochromic material is divided into an inorganic electrochromic material and an organic electrochromic material, wherein WO3 film for preparing an electrochromic material belongs to an inorganic electrochromic material. While do you know what the hot spot in the field of science research is? It is the study of electrochromic materials and smart windows, which have the characteristics of energy conservation and environmental protection. But why? Because the environment is seriously polluted, and the energy is reduced gradually. Also, there is global warming. Besides, there are still many other serious problems.

WO3 electrochromic film, as an electrochromic material, more precisely, an inorganic electrochromic material, has high coloring efficiency, fast color change response time, good electrochemical reversibility and chemical stability, and low cost, so it may be applied to produce an smart window for applying in energy-saving buildings.

WO3-PEO electrochromic thin film can be prepared by the following two major processes. First, prepare the sol, and then prepare the doped electrochromic film. The specific steps are as follows.

WO3 can be prepared into a WO3 film, and then be applied for the production of a new electrochromic device. Wherein, the WO3 electrochromic film is the typical representative of the earliest and most studied cathode electrochromic material.

Tungsten trioxide is a typical cathode electrochromic material for preparing WO3 film, which has the advantages of large light modulation range, high color change efficiency and good cycle reversibility, so it can be used for producing a new electrochromic device. Wherein, WO3 and WO3 electrochromic film have been extensively studied.

WO3 powder has always been the most fully studied electrochromic material. However, there are still many problems in the preparation and practical application of large-area WO3 electrochromic thin films for assembling a large area electrochromic device. In other words, the production of large-area WO3 electrochromic devices and its promotion of practical applications still have a long way to go.

Tungsten trioxide powder may be used to study or assemble a large area electrochromic device such as a smart window (an energy-saving glass), to regulate the transmission of light, thereby reducing the cooling energy consumption of buildings. It is reported that such smart glass is in line with international environmental protection and energy conversation. Also, as the theme of environmental protection and energy conversation is deeply concerned by the public, the smart device of tungsten trioxide film will have a wide application.

Tungsten oxide powder may be used to prepare a smart device – a large area electrochromic device such as a large area smart window. As you may have known, smart technology has pervaded just about every aspect of daily life. For example, smart phones are ubiquitous. And it is believed that smart windows and many other smart devices in the home are becoming the norm.

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.