Yellow tungsten oxide, namely tungsten trioxide, is an important smart heat insulation coating with the advantages of high heat insulation, high heat preservation and high transparency. Therefore, the new environmentally-friendly film has a wide range of applications. For example, it can be used in applications such as building doors and windows, automotive glasses, greenhouses, and so on.

Yellow tungsten oxide, or tungsten trioxide, can be used as a cathode electrochromic material on the smart heat insulation window glass. So, these glasses will have excellent heat insulation effect, thereby reducing the air conditioning refrigeration cost in the hot summer, and also achieving the purpose of energy conservation and environmental protection.

Yellow tungsten oxide, or WO3, can be used to prepare smart heat insulation film for smart windows, including building smart windows and car smart windows, which provide good heat insulation performance and high UV resistance.

Nano yellow tungsten oxide, or nano particle size tungsten trioxide, or nano WO3, can be used as a cathode coloring material for smart window, mainly in the form of an electrochromic film, which can maintain very high light transmittance in both the colored state and the bleached state. In other words, such thin film will not affect the field of view with good thermal insulation effect. Therefore, WO3 has broad application prospects in the field of electrochromic smart windows.