A Review on Advances in the Gas-Sensitive Properties of Perovskite Materials

In the realm of gas sensors, research has been rather comprehensive on the gas-sensitive features of ordinary binary metal oxide materials. At present, ternary metal oxide materials are gradually becoming a hot spot in the research of gas sensors. Perovskite materials with a stoichiometric ratio of ABY 3 are mainly ternary metal oxide or halide materials. They have a diverse composition of elements, easily tunable structure and chemistry, the ability to host a high number of cations and oxygen vacancies, and thus excellent carrier transport and redox properties, which offer great potential for gas sensors. This paper outlines the current advances concerning the application of ABY 3 perovskites as gas sensors, specifying experimental tactics and approaches for improving gas sensing. It is expected that the described perovskite materials will result in measuring gases at low temperatures with improved selectivity, minimum detection limits and other sensing properties of the sensors. Graphical Abstract