Tungsten oxide film can be used to assemble a large area smart glass – an environmentally friendly and energy-saving glass. As you may have known, since S.K. Deb discovered the electrochromic phenomenon of WO3 in the early 1970s, tungsten trioxide has become a cathode coloring material that has attracted wide interest. And after that tungsten trioxide is frequently used in the research of electrochromic devices. But do you know which companies have the ability to produce large-area electrochromic glass on a large scale?
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For example, German companies. Several companies in Germany have experienced more than 20 years of development and now have the ability to produce large-area electrochromic glass on a large scale. Their products adopt a magnetron sputtering method to plate a metal oxide film as an electrochromic layer on a glass, and then use an organic polymer (PVB, etc.) as a solid electrolyte and an adhesive layer to form a laminated glass, and then made into a hollow glass, filled with argon. The visible light transmittance of such glass product is between 50% and 15%, the solar heat gain coefficient is adjustable between 0.38 and 0.12, the heat transfer coefficient is 1.1W/(m2?K), and the maximum size is up to 1.3m×3.0m.
