I−V characteristics of gas sensors based on tin dioxide thin films in wet air at room temperature

Abstract

In this work cyclical I−V characteristics of a gas sensor based on tin dioxide thin films in wet air at room temperature has been studied. It was demonstrated that cyclical voltage variation leads to redox reactions on the surface of the gas sensor active layer. Redox reaction potential does not depend on the gas concentration in an analyzed gas probe. Therefore, the redox potential can be used as an identifying agent.

Keywords

• I−V characteristics
• gas sensors
• thin films
• tin dioxide
• room temperature
• gas mixture identification