Intrinsic Defect Tolerance in Inorganic Tin–Lead Perovskites

is proven to contribute to the remarkable defect tolerance. We ascribe the poor photoelectric performance observed in inorganic Sn-Pb perovskites to inadequate miscibility of their components. This study reveals the inherent superior properties of inorganic Sn-Pb perovskites that have thus far remained unrecognized by the research community and suggests that achieving phase-pure mixing systems is crucial to fully exploit their untapped potential.