Atomically thin layered Molybdenum Disulfide


Similarly, atomically thin layered Molybdenum Disulfide/graphene/WSe2 (p–g–n) vdWHs were developed by Long et al. In this view, graphene was sandwiched within the p–n junction to broaden the spectral absorption range and photodetection sensitivity. A side view of Molybdenum Disulfide/graphene/WSe2 vdWHs, a schematic for the broadband photodetection and the wavelength-dependent photoresponsivity and detectivity (D) of the Molybdenum Disulfide/graphene/WSe2-based broadband photodetector over the 400 nm to 2400 nm wavelength range. Both the photoresponsivity and selectivity decreased with increasing excitation laser wavelength. The maximum photoresponsivity and detectivity values of the p–g–n heterostructure-based photodetector were 104 A W−1 and 1015 Jones in the visible range and decreased to a few mA W−1 and 109 Jones at the 2400 nm wavelength, respectively. A photoresponsivity of 4250 A W−1, a detective of 2.2 × 1012 Jones, and an EQE value of 1.0 × 106% was measured at 532 nm with a 0.2 nW laser power intensity for the p–g–n heterostructure-based photodetector, while the photoresponsivity dropped to 306 mA W−1 in the near-IR region, 940 nm with a 17 nW laser power. The photocurrent mapping conducted at 830 nm with a 20.5 μW laser power indicated that the overlapping regions of the Molybdenum Disulfide, graphene, and WSe2 atomic layers are responsible for the strong photoresponse instead of the electrode regions. The Molybdenum Disulfide/graphene/WSe2 heterostructure-based broadband photodetector also showed a fast photoresponse with a 53.6 μs rise time and a 30.3 μs fall time and can be used from the visible to the near-IR spectral range at room temperature. If you are looking for high quality, high purity and cost-effective Molybdenum Disulfide, or if you require the latest price of Molybdenum Disulfide, please feel free to email contact mis-asia.

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