The moisture-induced instability of metal halide perovskites is one of the major challenges for perovskite optoelectronic devices to meet the commercial requirements.
Organic spacer cations in layered 2D(A1)2(A2)n-1BnX3n+1(where A1 is an organic cation acting as a spacer between the perovskite layers,A2 is a monovalent cation,e.g.,Cs+,CH3NH3+,CH(NH2)2+)perovskite m
Improving device lifetime is one of the critical challenges for the practical use of metal halide perovskite solar cells(PSCs),wherein a reliable encapsulation is indispensable.