Recently, a direct-conversion γ-ray detector was reported by Yakunin et al. [94]. They proved lead halide perovskites MAPbI3, FAPbI3 and I-treated MAPbBr3 can act as γ-raydetecting materials. Among them, device based on FAPbI3 single crystal exhibited the highest charge-carrier mobility-lifetime product and the lowest noise levels and dark currents, showing great potential for γ-ray detection