Tungsten trioxide is an inorganic electrochromic material that can be used to produce an electrochromic glass. And the prepared smart glass is applied as an energy-saving window in buildings or automobiles to provide heat insulation effect as well as heat preservation performance. It is reported that at present, electrochromic smart glass for energy-saving windows in the construction market mainly adopts an inorganic transition metal oxide such as WO3 as an electrochromic material, and an inorganic lithium-containing compound or an organic polymer as an electrolyte layer to produce an all-solid-state electrochromic glass.
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So why choose all-solid-state technology instead of liquid technology? It mainly considered the fact that the liquid devices often use organic electrochromic materials, and organic electrochromic materials have unstable properties under ultraviolet irradiation, which may affect the service life and reliability of the products. European and American countries are also taking the all-solid-state smart electrochromic glass technology as the main development direction of the new generation of building energy-saving glass. Researchers have done a lot of research. And some enterprises have realized the industrialization of this technology.
