Inorganic Electrochromic Material: Yellow Tungsten Oxide Electrochromic Film

Yellow tungsten oxide electrochromic film, or WO3 electrochromic film, is an inorganic electrochromic material that can be used to prepare electrochromic devices with good coloring properties, large viewing angle, economy, memory effect and low energy consumption. And it is also the most studied electrochromic material. But what is the working principle of an electrochromic device assembled with a tungsten oxide film?

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According to experts, the principle of electrochromic devices is mainly based on redox reactions. When a voltage is applied, one electrode is oxidized and the other electrode is reduced, similar to the mechanism involved in lithium batteries. Wherein tungsten oxide electrochromic material undergoes a color change due to the redox reaction. In electrochromic devices, the electrolyte mainly provides conductive ions for the two electrodes, which is an indispensable component. And the electrochromic material - tungsten trioxide film is also an essential component. Without this electrochromic film, the electrochromic performance of the device is not available.

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