New Energy-saving Material: Yellow Tungsten Oxide Electrochromic Film

Yellow tungsten oxide, or tungsten trioxide, may be prepared into an electrochromic film, and then be used to produce a smart glass - a new energy-saving material. Due to its excellent heat insulation and heat preservation performance, such material is more and more widely applied in building energy-saving renovation. Experts say that tungsten trioxide film is probably the most practical electrochromic material in many electrochromic materials.

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In addition, experts have found that tungsten oxide films deposited on low temperature (<200°C) substrates have smaller particles. Their components tend to deviate from standard stoichiometry, and their molecular formula is approximately WO2.75, facilitating the injection of ions and electrons. The thin film is likely to be composed of clusters of hexagonal atoms, and there is also a cylindrical structure consisting of a ring structure of six WO6 octahedrons occupying the angle. This structure forms a fast transport channel for Li ions in the space between the clusters.

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