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.
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Specifically, the electrochromic technology utilizes an applied electric field to discolor the material, thereby achieving active dynamic control of light and solar radiation heat, so it is the most promising technology for large-scale commercial production currently. In fact, in addition to electrochromism, scientists have discovered that a variety of other techniques can achieve dynamic adjustment and control of the transmittance and reflectivity of the glass to sunlight, such as photochromism and thermochromism. These two technologies mainly use the material's sensitivity to light and heat to change color to achieve dynamic control of light. While they belong to passive control technology, so they cannot really adjust light according to people's needs. And for large-area architectural glass there are no successful cases in the window as for photochromism and thermochromism.
