Bright circularly polarized photoluminescence in chiral layered hybrid lead-halide perovskites.

ABSTRACT: Hybrid perovskite semiconductor materials are predicted to lock chirality into place and encode asymmetry into their electronic states, while softness of their crystal lattice accommodates lattice strain to maintain high crystal quality with low defect densities, necessary for high luminescence yields. We report photoluminescence quantum efficiencies as high as 39% and degrees of circularly polarized photoluminescence of up to 52%, at room temperature, in the chiral layered hybrid lead-halide perovskites (R/S/Rac)-3BrMBA₂PbI₄ [3BrMBA = 1-(3-bromphenyl)-ethylamine]. Using transient chiroptical spectroscopy, we explain the excellent photoluminescence yields from suppression of nonradiative loss channels and high rates of radiative recombination. We further find that pho

SUBMITTER: Liu S 

PROVIDER: S-EPMC10854422 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature