Ti-doped tungsten trioxide thin film is a new type of electrochromic thin film that is gradually used in the field of smart windows. Some experts used metal tungsten and titanium metal as sputtering targets to prepare Ti-doped WO3 electrochromic film on ITO glass. The results show:
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Ti doping does not reduce the discoloration amplitude of tungsten trioxide film, but significantly increases the cycle life of the film and shortens the response time. XRD results show that the crystal structure of WO3 film is not changed after Ti doping, and it is still amorphous. Experts believe that lithium ions accumulate in the film, and the film appears to be crystallized, which is not conducive to lithium ion migration, resulting in film degradation. The doping of Ti can reduce the accumulation of lithium ions in the film, and the crystallization tendency is weakened, thereby significantly increasing the cycle life of the tungsten trioxide electrochromic film.
