Tungsten Oxide Film Applied for Electrochromic Device

Tungsten oxide film is the most important layer in the structure of an electrochromic device. Wherein, WO3 film, the electrochromic layer, or the discoloration layer, plays a decisive role in the performance of the entire device. Under the action of the electric field, WO3 film of the electrochromic layer of the obtained tungsten oxide electrochromic device can undergo changes in color and optical properties.

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According to experts, an electrochromic device can be considered as an electrochemical cell, which is structurally similar to a sandwich with multilayer electrochemical devices in which each layer is in the form of a thin film. The structure of electrochromic devices is generally accepted by researchers as a typical 5-layer structure. The structure diagram of electrochromic device is shown in the above figure. From top to bottom, there are a transparent conductive layer, an electrochromic layer, an ion conductor layer (an electrolyte layer), an ion storage layer (a counter electrode layer), and a transparent conductive layer.

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