Hydrogen sulfide gas sensing properties of SnO2 thin films prepared by thermal evaporation technique

Abstract

It is well known that the doped SnO2 thin films are widely used as H2S gas sensors. But the application of pure SnO2 thin films as sensors for different gases is not much explored area. In this paper an attempt has been made to prepare thin films of pure SnO2 with simple and cost-effective technique such as reactive thermal evaporation and use them for application as sensors for H2S gas. These thin films show marginal sensor signal for 5-150 ppm of H2S gas in the temperature range of 160 - 220 C.