One-Dimensional Organic–Metal Halide with Highly Efficient Warm White-Light Emission and Its Moisture-Induced Structural Transformation

Abstract

Molecular low-dimensional organic–metal halide hybrids have shown great potentials as light emitters with excellent color tunability. High photoluminescence quantum efficiency (PLQE) and high color rendering index (CRI) are two essential requirements for them to act as down conversion phosphors to achieve single-component white-light emission. Here, we report an organic–metal halide hybrid [C4N2H12]3[PbBr5]2·4DMSO with a one-dimensional (1D) structure at the molecular level, which possesses a record-setting PLQE of 60% and high CRI value of 84 as a promising single-component white-light emitter. We have also experimentally observed the photoluminescence quenching of [C4N2H12]3[PbBr5]2·4DMSO and its transformation to 0D [C4N2H12]4[Pb2Br11]Br·4H2O, which suggests that the degradation process involves water-molecule replacement and moisture-induced cleavage of 1D lead halide chains.