Yellow tungsten oxide electrochromic film can be used to prepare a large area electrochromic device, which is a well known energy-saving glass for applying in building glasses. And the performance of the prepared electrochromic device must be tested. For example, test the coloring efficiency - one of the most important performance indicators for measuring electrochromic devices.

Tungsten trioxide film is the right electrochromic material that is widely used to prepare large area electrochromic device currently. After decades of development, some companies have already prepared or are preparing to bring large-area electrochromic smart windows to the market.

WO3 film is the earliest and the most studied electrochromic material. And it is also an inorganic electrochromic film material that can be used to study and prepare a large area electrochromic glass. According to experts, the electrochromic glass technology can dynamically control the ray of light and the radiant heat of sun according to the actual needs of people as the season and time change.

Tungsten oxide film is considered to be the most promising inorganic electrochromic material for large-scale production of large area electrochromic glass. Therefore, WO3 powder and WO3 electrochromic film and even WO3 electrochromic device have received great attention. So why large area smart glass is a focus in the construction sector?

Tungsten trioxide, more precisely, WO3 film is often used to develop and produce a large area smart glass – an energy-efficient glass that is widely applied in building energy efficiency. As China's building energy efficiency is still at a very backward level, China's average building energy consumption is more than three times that of developed countries, and it consumes 500 million tons of standard coal per year.

It is well known that yellow tungsten oxide electrochromic film can be used to produce a large area smart glass. While do you know what the main companies that have already or are preparing to bring large-area electrochromic glass technology to the market after decades of development?

Tungsten trioxide film can be used to prepare a large area smart glass as the WO3 material itself has good electrochromic properties. And the technology of large-area electrochromic glass is one of the main technologies required for building energy efficiency today.

Tungsten oxide film can be used to prepare an all-solid-state electrochromic window. Specifically, such an electrochromic device is assembled using an inorganic transition metal oxide (mainly tungsten trioxide) as an electrochromic material, and an inorganic lithium-containing compound or an organic polymer as an electrolyte layer.

Yellow tungsten oxide electrochromic film, also known as tungsten trioxide film, can be used to assemble an all-solid-state electrochromic window. Wherein the tungsten trioxide electrochromic thin film can be prepared by a hydrothermal method. The following are the preparation steps of the WO3∙0.33H2O film:

Tungsten trioxide film for producing an all-solid-state electrochromic window can be prepared by a sol-gel method in electrochemical and wet chemical methods. Certainly, there are many other preparation methods for electrochromic materials. These preparation methods commonly used at home and abroad include vacuum evaporation method, sputtering method, chemical vapor deposition method, ion plating technology, and electrochemical deposition method. The following is something about the sol-gel method.