Anisotropic electronic coupling in three-dimensional assembly of CsPbBr₃ quantum dots.

ABSTRACT: Cesium lead halide (CsPbX₃, X = Cl, Br, or I) perovskite quantum dots (PeQDs) show promise for next-generation optoelectronics. In this study, we controlled the electronic coupling between PeQD multilayers using a layer-by-layer method and dithiol linkers of varying structures. The energy shift of the first excitonic peak from monolayer to bilayer decreases exponentially with increasing interlayer spacer distance, indicating the resonant tunnelling effect. X-ray diffraction measurements revealed anisotropic inter-PeQD distances in multiple layers. Photoluminescence (PL) analysis showed lower energy emission in the in-plane direction due to the electronic coupling in the out-of-plane direction, supporting the anisotropic electronic state in the PeQD multilayers. Temperature-depen

SUBMITTER: Enomoto K 

PROVIDER: S-EPMC11323341 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature