The role of anions and cations in the gas sensing mechanisms of graphene decorated with lead halide perovskite nanocrystals

We report the effects of both anions and cations in lead halide perovskite-graphene hybrids applied to gas sensing. Ultra-fast sensors that can work at room temperature are developed and studied to elucidate the role in the gas sensing mechanisms of different ions in perovskite nanocrystals.