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  • Title: Interlayer Transition and Infrared Photodetection in Atomically Thin Type-II MoTe₂/MoS₂ van der Waals Heterostructures.
    Author: Zhang K, Zhang T, Cheng G, Li T, Wang S, Wei W, Zhou X, Yu W, Sun Y, Wang P, Zhang D, Zeng C, Wang X, Hu W, Fan HJ, Shen G, Chen X, Duan X, Chang K, Dai N.
    Journal: ACS Nano; 2016 Mar 22; 10(3):3852-8. PubMed ID: 26950255.
    Abstract:
    We demonstrate the type-II staggered band alignment in MoTe2/MoS2 van der Waals (vdW) heterostructures and an interlayer optical transition at ∼1.55 μm. The photoinduced charge separation between the MoTe2/MoS2 vdW heterostructure is verified by Kelvin probe force microscopy (KPFM) under illumination, density function theory (DFT) simulations and photoluminescence (PL) spectroscopy. Photoelectrical measurements of MoTe2/MoS2 vdW heterostructures show a distinct photocurrent response in the infrared regime (1550 nm). The creation of type-II vdW heterostructures with strong interlayer coupling could improve our fundamental understanding of the essential physics behind vdW heterostructures and help the design of next-generation infrared optoelectronics.
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