Journal
OPTICS LETTERS
Volume 42, Issue 17, Pages 3335-3338Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.42.003335
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Funding
- National Natural Science Foundation of China (NSFC) [11504331, 61605174]
- China Postdoctoral Science Foundation [2015M582194]
- Zhengzhou University [1512317002]
- Research Grants Council, University Grants Committee (RGC, UGC) [GRF 152109/16E PolyU B-Q52T]
- National Natural Science Foundation of China
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Polycrystalline 2D layered molybdenum disulfide (MoS2) films were synthesized via a thermal decomposition method. The MoS2/Si heterostructures were constructed in situ by synthesis MoS2 on plane Si substrates. Such MoS2/Si heterostructures exhibited high sensitivity to light illumination with wavelengths ranging from the deep ultraviolet to the near infrared. Photoresponse analysis reveals that a high responsivity of 23.1 A/W, a specific detectivity of 1.63 x 10(12) Jones, and a fast response speed of 21.6/65.5 mu s were achieved. Notably, the MoS2/Si heterojunction photodetector could operate with excellent stability and repeatability over a wide frequency range up to 150 kHz. The high performance could be attributed to the high-quality heterojunction between MoS2 and Si obtained by the in situ fabrication process. Such high performance with broadband response suggests that MoS2/Si heterostructures could have great potential in optoelectronic applications. (C) 2017 Optical Society of America
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