Li-doping WO3 Electrochromic Film

Li-doping WO3 electrochromic film has received much attention and research with the pure tungsten trioxide films. That is because they all play an important role in the research of electrochromic materials and devices with the characteristics of high coloring efficiency, good reversibility, long memory time and other excellent electrochromic properties.

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In order to analyze the structure of Li-doped tungsten trioxide film and test its performance, some experts used spectral ellipsometry (SE) to measure the thickness of the film. The microstructure of the WO3 film was determined by X-ray diffractometry (XRD) and field emission scanning electron microscopy (SEM). The doping amount of Li of the film sample was measured by XPS. The transmission spectrum of the WO3 film in the original state, the colored state and the color fading state was measured by an ultraviolet/visible/near-infrared spectrophotometer. They used the prepared WO3 film as the working electrode, the PT plate as the counter electrode, the saturated Ag/AgCL electrode as the reference electrode, and the 1mol/L LiCLO4/PC solution as the electrolyte to test the electrochemical performance of the film on an electrochemical workstation adopting a three-electrode method.

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