
WO3 may be applied for producing a new type of transparent thermal insulation paper, that is, a transparent tungsten trioxide electrochromic film. The obtained heat insulating film is a WO3 nano-array electrochromic film with the morphology of nano-clusters, nano-trees or nanowire arrays. And such new thermal insulation film has the advantages of large spectral adjustment range, high coloring efficiency, fast response speed, and long cycle life. In field of electrochromism, that is, in the field of smart window, tungsten trioxide…