Amorphous WO3 film may be used to produce a new type of energy-saving smart glass for use in the fields of buildings or automobiles to provide excellent performance of high thermal insulation. Also, such smart heat insulation glass is a type of safety glass.
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While do you know the electrochromic properties of amorphous WO3 films? Some experts first prepared crystalline WO3 nanoparticles by hot-wire chemical vapor deposition process, and further prepared WO3 electrochromic thin films by electrophoresis, and then compared their electrochromic properties with amorphous WO3 films deposited by conventional chemical vapor method. It was found that the crystalline nanoparticle WO3 electrochromic film has better cycle stability in an acidic solution, and its electrochromic performance is not significantly degraded after 3000 cycles. While the electrochromic performance of amorphous WO3 electrochromic film after 500 cycles in an acidic solution is degraded significantly. The optimal color change efficiency of WO3 nanoparticle film is 42cm2/C, which is comparable to the color change efficiency (55cm2/C) of amorphous WO3. In addition, the charge density of the WO3 nanoparticle film CV cycle is more ambiguous, indicating that the nanostructure is favorable for ion injection. Experts believe that these performance improvements may be related to the larger active surface of the nanoparticles and the loose film structure.
