Switchable Photoresponse Mechanisms Implemented in Single van der Waals Semiconductor/Metal Heterostructure.

ABSTRACT: van der Waals (vdW) heterostructures based on two-dimensional (2D) semiconducting materials have been extensively studied for functional applications, and most of the reported devices work with sole mechanism. The emerging metallic 2D materials provide us new options for building functional vdW heterostructures via rational band engineering design. Here, we investigate the vdW semiconductor/metal heterostructure built with 2D semiconducting InSe and metallic 1T-phase NbTe₂, whose electron affinity χ_InSe and work function Φ_NbTe2 almost exactly align. Electrical characterization verifies exceptional diode-like rectification ratio of >10³ for the InSe/NbTe₂ heterostructure device. Further photocurrent mappings rev

SUBMITTER: Du M 

PROVIDER: S-EPMC8793132 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature