
Nano tungsten oxide may be applied for producing window heat insulation film. And therefore, such films can be applied in car windows or building windows. The photochromic properties or electrochromic properties of tungsten oxide will be reflected in accordance with its application mechanism. When tungsten oxide is used in practical applications as an electrochromic device, it has a long color retention time, which shows a certain storage memory ding. This property requires an ion conductor layer in an electrochromic device…