Tungsten trioxide can be applied for the preparation of smart window as WO3 has the advantages of high electrochromic color contrast, good cycle stability and good thermal stability. And therefore tungsten trioxide nano particles have become the most researched and commercialized inorganic electrochromic material in recent years.
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The smart window was proposed by American scientist C.M.Lampert and Swedish scientist C.G.Granqvist in the 1980s. At the time, they proposed an electrochromic device with a "sandwich" structure centered on an electrochromic film, namely a smart window. The introduction of electrochromic smart windows has promoted the development of electrochromic technology and opened up a new journey of electrochromic research. Subsequently, electrochromic devices have found applications in other fields such as automotive glass, anti-glare rearview mirrors, and aerospace. According to experts, the smart window of tungsten trioxide nano powder will be more and more widely used in building glass, car window and so on.
