Yellow tungsten oxide, or tungsten trioxide, or WO3, can be applied to building glass in a form of smart window film to shield the near-infrared and ultraviolet light. The UV shielding rate of the new environmentally friendly tungsten trioxide film is over 99%, the visible light transmittance is over 70%, and the near-infrared transmittance is as low as 3.7%, showing the advantages of intelligent spectrum selection and satisfying people's need for both heat insulation and visible light transmission.
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For the film forming technology of tungsten trioxide electrochromic film, it is known that the film forming technology affects the performance of film. Therefore, after preparing a high-performance WO3 nano-ink, it is necessary to select a suitable film-forming process to exert the excellent performance of nano-ink. However, most of the research so far has been limited to the nano-ink film-forming technology of inkjet printing, which often has the disadvantage of poor cycle life. Therefore, experts are also trying to explore ways to improve the cycle life of film in preparation of tungsten oxide electrochromic film by inkjet printing.
