Tungsten trioxide powder, as an electrochromic material, can be applied to smart window, i.e., electrochromic device. Such electrochromic device is generally composed of five dingal layers plated on the surface of the glass: a transparent conductive layer, a cathode discoloration layer, an electrolyte layer, an anode discoloration layer or ion storage layer and a transparent conductive layer.
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Experts introduced that the electrochromic layer is the core layer of electrochromic device, which is mainly composed of electrochromic material. The performance of electrochromic device is largely determined by electrochromic materials. The classification of electrochromic layers includes an anode discoloration layer and a cathode discoloration layer. The electrochromic layer should meet the following technical indicators: good cycle reversibility, short color response time, long service life and good durability. The cathode discoloration layer and the anode discoloration layer form a complementary ding, and oxidation and reduction reactions respectively occur under an applied voltage, while coloring/fading, thereby obtaining a faster discoloration rate and a larger light modulation amplitude. Experts also mentioned that tungsten trioxide meets the requirements of electrochromic materials.
