Electrochromic Material: Cesium Tungsten Bronze

Cesium tungsten bronze is an electrochromic material that can undergo electrochromic effects. So, nano particle size cesium tungsten bronze is often applied to produce different types of heat insulation materials for applying to smart windows of buildings or cars. But what is the electrochromic effect? And why does cesium tungsten bronze have different colors?

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Electrochromic effect refers to the reversible color change effect under the action of an electric field. The color center model considers that the reason for crystal color change is that there is a defect in the crystal that can absorb visible light. This kind of defect is called the color center. When the cesium tungsten bronze is subjected to the external energy field, the crystal structure changes and the defects on the crystal increase. These defects become dipoles, the reaction of the external photons and energy and dipoles, making cesium tungsten bronze have a variety of different colors.

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