High-Performance Photodetectors Based on MoTe₂-MoS₂ van der Waals Heterostructures.

ABSTRACT: Two-dimensional (2D) materials have got extensive attention for multifunctional device applications in advanced nanoelectronics and optoelectronics, such as field-effect transistors, photodiodes, and solar cells. In our work, we fabricated MoTe₂-MoS₂ van der Waals heterostructure photodetectors with great performance using the mechanical exfoliation method and restack technique. It is demonstrated that our MoTe₂-MoS₂ heterostructure photodetector device can operate without bias voltage, possessing a low dark current (10 pA) and high photocurrent on/off ratio (>10⁴). Importantly, the room temperature photoresponsivity of the MoTe₂-MoS₂ photodetector can reach 110.6 and 9.2 mA W^-1 under λ = 532 and 1064 n

SUBMITTER: Ji X 

PROVIDER: S-EPMC8973031 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature