Tungsten Oxide Film Applied for Large Area Electrochromic Device

Tungsten oxide film, as a typical cathode electrochromic material, has been widely studied as it has the advantages of large light modulation range, high color change efficiency and good cycle reversibility so that it can be used to prepare a large area electrochromic device. And the prepared electrochromic device can be used in the field of building for achieving the purpose of heat insulation and energy conservation. In recent years, as a new energy-saving material, WO3 electrochromic film has received more and more attention. So, how to prepare WO3 electrochromic material?

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The reported preparation method of WO3 electrochromic film is comprehensive, which covers almost all the preparation techniques of film. However, the difference in preparation methods will directly affect the chemical composition, microstructure and appearance of the prepared tungsten oxide film, thereby affecting the electrochromic properties of the film. Therefore, an in-depth understanding of the preparation method and rational use can help to prepare a WO3 electrochromic film with better performance. The preparation methods of the commonly used WO3 electrochromic film are mainly hydrothermal (solvent) method, sol-gel method, electrodeposition method, anodizing method and sputtering method. That is to say, WO3 can be prepared by the abovementioned method.

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