WO3 Film Applied for Thin Film Gas-sensing Element

WO3 film, an n-type semiconductor, is used as an excellent thin film gas-sensing element in applications of gas sensors. You know, WO3 is a typical n-type gas sensing material that has attracted considerable attention to detect various hazardous gases, in the form of nano particles or thin films.

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According to the researchers, a thin film gas-sensing element has the advantages of good consistency, good sensitivity to toxic gases, fast response, low cost, etc. Studies have shown that WO3-based thin film gas sensors have good sensitivity and selectivity to NOx, SOx, H2S and other gases. WO3 film is usually prepared by sol-gel method. Because the sol-gel method has many advantages. For example, the thickness, particle size and composition of WO3 film can be easily controlled by controlling the preparation conditions. The equipment required for the preparation method is simple and the heat treatment temperature is low.

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