Water-induced MAPbBr₃@PbBr(OH) with enhanced luminescence and stability.

ABSTRACT: Poor stability has long been one of the key issues that hinder the practical applications of lead-based halide perovskites. In this paper, the photoluminescence (PL) quantum yield (QY) of bromide-based perovskites can be increased from 2.5% to 71.54% by introducing water, and the PL QY of a sample in aqueous solution decreases minimally over 1 year. The enhanced stability and PL QY can be attributed to the water-induced methylamino lead bromide perovskite (MAPbBr₃)@PbBr(OH). We note that this strategy is universal to MAPbBr₃, formamidine lead bromide perovskite (FAPbBr₃), inorganic lead bromide perovskite (CsPbBr₃), etc. Light-emitting devices (LEDs) are fabricated by using the as-prepared perovskite as phosphors on a 365 nm UV chip. The luminanc

SUBMITTER: Liu KK 

PROVIDER: S-EPMC7078192 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature