Regulation of the luminescence mechanism of two-dimensional tin halide perovskites.

ABSTRACT: Two-dimensional (2D) Sn-based perovskites are a kind of non-toxic environment-friendly luminescent material. However, the research on the luminescence mechanism of this type of perovskite is still very controversial, which greatly limits the further improvement and application of the luminescence performance. At present, the focus of controversy is defects and phonon scattering rates. In this work, we combine the organic cation control engineering with temperature-dependent transient absorption spectroscopy to systematically study the interband exciton relaxation pathways in layered A₂SnI₄ (A = PEA⁺, BA⁺, HA⁺, and OA⁺) structures. It is revealed that exciton-phonon scattering and exciton-defect scattering have different effe

SUBMITTER: Zhang T 

PROVIDER: S-EPMC8748536 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature