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.
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As you may have known, for small-area electrochromic devices, organic electrochromic materials can be used, and liquid electrolytes can be used to conduct ions. It is easy to operate with less cost. But, in addition to the hidden danger of leakage of liquid electrolyte, organic electrochromic materials are still unstable. Especially, under the irradiation of ultraviolet rays, organic electrochromic materials will greatly affect the long-term reliability of the electrochromic device. At least 20 years of life is required for the window or exterior glass of a building. Therefore, all-solid-state electrochromic glass has become the most suitable technology for the building energy-saving industry. Considering that most of the glass used in today's buildings is of large area, large-area all-solid-state electrochromic glass is the most urgent technical problem to be solved in the building energy-saving industry.
