Violet Tungsten Oxide Applied for Inorganic Electrochromic Film

Violet tungsten oxide is a type of tungsten oxide powder that may be applied for producing an inorganic electrochromic film. And the prepared smart film may be applied to architectural glass to make the room "warm in winter and cool in summer", thereby saving energy and reducing consumption, also reducing the cost of air conditioning for cooling and warming the room.

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However, the electrochromic response time and efficiency of tungsten oxide have yet to be further improved compared to organic electrochromic materials. The electrochromic response time, the time constant of the ion intercalation reaction, depends on the diffusion coefficient of the ions and the length of the diffusion path, both of which depend on the chemical structure and crystal structure of tungsten oxide material. Electrochromic efficiency is often associated with the surface topography of the material. Therefore, experts have attempted to improve their electrochromic properties by designing a unique tungsten oxide nanostructure with a suitable crystal structure.

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