Tungsten trioxide is an important inorganic photochromic material that has a good application prospect in smart windows. In addition, WO3 has a good application prospect in the fields of photocatalysis, large-screen display, and high-density information storage. And thus WO3 nano powder has attracted widespread attention of scientists.
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Experts say that tungsten trioxide nano powders have better stability and lower cost than organic photochromic materials. However, the photochromic efficiency of tungsten trioxide nano particles is poor. In order to improve the color change efficiency of such inorganic materials, experts have proposed various solutions and have achieved many meaningful results. For example, the composite of the photoresponsive material and the tungsten trioxide powder can effectively suppress the recombination process of the electrons after photoexcitation, thereby increasing the number of photogenerated carriers involved in the discoloration process and improving the photochromic performance of the tungsten trioxide nano particles.
