Mo-doping tungsten oxide electrochromic film may be used to assemble a smart glass with high heat insulation and high heat preservation properties so that it is usually applied for building energy efficiency. According to experts, such a heat insulating film can be prepared by a combination of magnetron sputtering and spraying, or directly by spraying. Some experts have studied the devices that assembled using a Mo-doped tungsten oxide film by magnetron sputtering and spraying and a Mo-doped tungsten oxide film by direct spraying.
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The electrochromic device assembled with Mo-doping tungsten oxide electrochromic thin film prepared by magnetron sputtering and spraying has the largest optical modulation range. A device assembled with a directly sprayed electrochromic film has a minimum light modulation range. This is because magnetron sputtering can play the role of a transition layer, so that the obtained film has uniform particle size and good compactness. Also, the film is fully attached to the FTO conductive glass. And therefore, the applied current can be conducted to the electrochromic layer more quickly, and the response speed is improved. And then the spraying is performed. The film prepared by spraying is relatively dense, so that lithium ions can be more easily embedded in tungsten oxide electrochromic film.
