WO3 Powder Applied for Large Area Electrochromic Glass

WO3 powder can be prepared into an electrochromic film and then be used to assemble a large area electrochromic glass. As you may have known, the reason why the color of tungsten oxide electrochromic film undergoes a reversible transition in a specific wavelength range of light is that WO3 undergoes a redox reaction under the stimulus of applying a lower voltage to it. In fact, the color change of tungsten oxide electrochromic film is mainly due to the fact that it produces a new absorption band in the spectral region.

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In addition, in view of the development prospects of electrochromic smart windows in green buildings, many researchers have begun to actively explore ways to prepare high-performance electrochromic films, including hydrothermal methods, electrodeposition methods, high temperature reduction techniques, and anode growth method, filtration, spin coating, layer deposition method, and drop coating method, and the like. However, the above methods have many shortcomings, including complicated preparation processes, high energy consumption, and difficulty in large-area manufacturing. While spray coating is widely used because of its high production rate and its ability to make large-area electrochromic devices.

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