Highly efficient self-trapped exciton emission in a one-dimensional face-shared hybrid lead bromide

Abstract

A new one-dimensional (1D) face-shared hybrid lead bromide of (2cepiH)PbBr₃, which exhibits intrinsic broadband yellow-light emission with a quantum yield of 16.8% outperforming all previously reported 1D face-shared hybrid metal halides, is obtained. The origin of broadband emission and the coexistence of free excitons and self-trapped excitons are deeply investigated by variable-temperature photoluminescence spectra. Our work paves the way to discovering more wonderful light-emitting materials.