Journal
ADVANCED MATERIALS
Volume 30, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201706561
Keywords
density functional theory; glassy-graphene; heterostructures; MoS2; photodetectors
Categories
Funding
- UK EPSRC Future Compound Semiconductor Manufacturing Hub [EP/P006973/1]
- U.S. Army Research Laboratory [W911NF-16-2-0120]
- UK EPSRC [EP/L018330/1]
- 973 Program-the National Basic Research Program of China Special Funds for the Chief Young Scientist [2015CB358600]
- National Natural Science Foundation of China [21422103]
- China Scholarship Council (CSC)
- Engineering and Physical Sciences Research Council [EP/L018330/1, EP/P000886/1, EP/K029118/1, EP/P006973/1] Funding Source: researchfish
- EPSRC [EP/K029118/1, EP/P006973/1, EP/P000886/1, EP/L018330/1] Funding Source: UKRI
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Layered van der Waals heterostructures have attracted considerable attention recently, due to their unique properties both inherited from individual twodimensional (2D) components and imparted from their interactions. Here, a novel few-layer MoS2/glassy-graphene heterostructure, synthesized by a layer-by-layer transfer technique, and its application as transparent photodetectors are reported for the first time. Instead of a traditional Schottky junction, coherent ohmic contact is formed at the interface between the MoS2 and the glassy-graphene nanosheets. The device exhibits pronounced wavelength selectivity as illuminated by monochromatic lights. A responsivity of 12.3 mA W-1 and detectivity of 1.8 x 10(10) Jones are obtained from the photodetector under 532 nm light illumination. Density functional theory calculations reveal the impact of specific carbon atomic arrangement in the glassy-graphene on the electronic band structure. It is demonstrated that the band alignment of the layered heterostructures can be manipulated by lattice engineering of 2D nanosheets to enhance optoelectronic performance.
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