Photoluminescence Enhancement by Band Alignment Engineering in MoS₂/FePS₃ van der Waals Heterostructures.

ABSTRACT: Single-layer semiconducting transition metal dichalcogenides (2H-TMDs) display robust excitonic photoluminescence emission, which can be improved by controlled changes to the environment and the chemical potential of the material. However, a drastic emission quench has been generally observed when TMDs are stacked in van der Waals heterostructures, which often favor the nonradiative recombination of photocarriers. Herein, we achieve an enhancement of the photoluminescence of single-layer MoS₂ on top of van der Waals FePS₃. The optimal energy band alignment of this heterostructure preserves light emission of MoS₂ against nonradiative interlayer recombination processes and favors the charge transfer from MoS₂, an n-type semiconductor, to FePS₃

SUBMITTER: Ramos M 

PROVIDER: S-EPMC9335528 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature