Tungsten Trioxide Thin Film Situation

Thin Film material with optical properties, electrical properties, magnetic properties, chemical properties, mechanical properties, thermal properties, thin film with a variety of properties and thus be applied in many fields, for example, as electrical film, optical film, hard film, corrosion film, lubricating film, decorative film, packaging film. Among the film material, tungsten trioxide thin film has a variety of features such as electrochromic, gasochromic, photochromic, thermochromic performance, also has good electrochemical properties, tungsten trioxide thin film has a wide range of applications, such as smart color windows, gas sensors, PH meter. There are researches of tungsten trioxide thin film materials in the sixties, especially in photochromic electricity, electrochemical performance.

More and more scientists began to focus on gas sensing properties of tungsten trioxide thin film. For hydrogen sensitive performance, tungsten trioxide thin film has great potential because when the tungsten trioxide thin film contacts with hydrogen, it can change from colorless to blue thin film. Tungsten trioxide thin film has great potential in gas-sensitive material, tungsten trioxide thin film not only can be used as hydrogen-sensitive materials, also is different from doping elements under different conditions. It is also used for other gases such as NH₄, NO₂, H₂S, O₃, O₂ and other sensitive material. For example, Au-doped tungsten oxide thin film can improve hydrogen sulfide gas, gas sensitivity; doped palladium or platinum can improve WO3 thin film for hydrogen gas sensitivity.

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