Tungsten trioxide can be prepared into an EC film and thus be used to produce a smart glass window. Numerous studies by Berkeley National Laboratory have shown that electrochromic windows can increase building energy efficiency, and can reduce the cooling and lighting power consumption by up to 50% for commercial buildings. And it can also reduce energy consumption by 16% at a lowest value.

WO3 powder can be prepared into a WO3 film and be used to produce an electrochromic glass - a smart glass that is considered to be a new direction for building energy efficiency. As a new type of energy-saving glass, such electrochromic device is very expensive, generally thousands of yuan per square meter, so, its positioning is naturally a high-end market application. While the smart glass will be cheaper someday when the electrochromic technology is mature to prepare large area smart glasses on a large scale.

Yellow tungsten oxide can be used to prepare an electrochromic film for the production of an electrochromic glass. The obtained smart glass is an energy-saving glass that can dynamically control the transmittance of heat radiation in different bands according to the geographical location of the area, the angle of the sun, the change of seasons and the needs of the indoor activity staff, while enhancing the comfort of the indoor environment.

Tungsten oxide can be used to prepare a new type of electrochromic glass, which is a smart glass obtained by combining electrochromic technology with glass. And it is a heat insulating glass can realize the active regulation of light transmission or absorption under the action of an electric field, thereby selectively absorbing or reflecting external heat radiation and preventing heat loss in the room, and thus achieving the purpose of reducing room temperature and energy consumption and simultaneously improving the comfort of the interior light.