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- W3171776278 abstract "Abstract Infrared (IR) detectors based on photo‐induced tunneling in van der Waals heterostructures (vdWHs) of graphene/h‐BN/graphene or MoS 2 /h‐BN/graphene exhibit extremely low dark currents owing to a large electron barrier. However, a lack of tunneling barrier materials except for h‐BN for 2D vdWHs limits their further enhancement. In this study, a broadband detection is reported with high sensitivity and fast photoresponse of IR proximity sensor by a vdW integration (2D‐3D) of graphene or MoS 2 , with NiO/Ni as the IR absorber and hole selective transport layer/counter electrode. The low Schottky barrier height of the reported junctions suppresses dark current with a high detectivity ≈ 10 14 Jones and generates a photocurrent by transporting photo‐excited carriers through a low hole barrier at a wide wavelength. Two types of integrated IR proximity sensor applications are developed: a passive sensor (MoS 2 /NiO/Ni) for the near‐IR (NIR) range and an active sensor (Gr/NiO/Ni) for the mid‐IR (MIR) range. The former shows a broadband photoresponse to reflect the NIR, while the latter absorbs human body irradiation (2–16 µm wavelength) with a fast photoresponse of 3.5 s (rise time) and 1.8 s (fall time). The fabricated sensors utilize low power, broadband detection, high sensitivity, fast photoresponse, and large‐scale area at room temperature." @default.
- W3171776278 created "2021-06-22" @default.
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- W3171776278 date "2021-05-28" @default.
- W3171776278 modified "2023-09-27" @default.
- W3171776278 title "Infrared Proximity Sensors Based on Photo‐Induced Tunneling in van der Waals Integration" @default.
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- W3171776278 doi "https://doi.org/10.1002/adfm.202100966" @default.
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