Compared with the tungsten trioxide film, the structure and color change response of the Li doping tungsten trioxide film has greatly improved.
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Since the 1970s, with the aggravation of the energy crisis, the electrochromic effect has increasingly attracted people's attention. At that time, the concept of “smart window” proposed by using electrochromic effect has quickly become a hot spot of research. And tungsten trioxide is the earliest and the most studied electrochromic material with the advantages of stable performance and good optical adjustment. Therefore, WO3 is often used as an electrochromic material for smart window. In order to meet the needs of practical applications, the performance of the tungsten trioxide electrochromic film is often improved by doping. And experts adopted sol-gel method to produce tungsten trioxide film doping with lithium perchlorate. Also, the properties of the film were characterized and the doping amount was discussed and analyzed.
