MoO3 doping tungsten oxide may be applied for preparing electrochromic film. And such a smart film can be prepared by a direct current magnetron sputtering method, a spray coating method, and a combination of DC magnetron sputtering method and spray coating method. Wherein, some experts have studied the preparation of WO3 electrochromic thin films by these three methods and found that:
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1.0 The obtained tungsten oxide - molybdenum oxide composite electrochromic film can be prepared by direct current magnetron sputtering. When the oxygen to argon ratio was 3:70, the optical modulation range of the electrochromic device reached the maximum, which was 49.52%.
2.0 The Mo doped tungsten trioxide electrochromic thin film prepared by spraying method has relatively poor electrochromic ability with low cost and simple process.
3.0 The obtained composite electrochromic film prepared by a combination of magnetron sputtering and spray coating has better electrochromic performance than the film prepared by spraying method. Wherein, the device assembled by the electrochromic thin film which was sputtered by magnetron sputtering for 4 minutes and then spraying had the largest light modulation range, reaching 32.38%. When magnetron sputtering was performed for 4 min, the film thickness obtained at this time was favorable for the injection and extraction of cations.
