Abstract
The epitaxial growth of non-layered PbSe nanoplates on monolayer MoS2 is demonstrated. Scanning electron microscopy characterization reveals a position-independent growth of PbSe plates on a MoS2 sheet with large coverage. The epitaxial relationship between the PbSe plates and MoS2 sheet was found to be ∥ in-plane and ∥ in the thickness direction. Photodetectors based on these heterostructures exhibit a responsivity and detectivity of 51 mA W–1 and 4.4 × 106 Jones, respectively, under 1550 nm light illumination at room temperature. The realization of these PbSe/MoS2 heterostructures paves the way for the application of transition metal dichalcogenides in the IR light region.
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