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In this Article, we reported a defective macro-assembled graphene nanofilm (D-nMAG)/Silicon (Si) photodetector using trap-assisted gain to optimize the photoelectric response. This wafer-scale environmentally friendly carbon material can be easily compatible with the complementary-metal-oxide-semiconductor (CMOS) technical. Noteworthy, the defective states in D-nMAG trap carriers and then enter the conduction (CB) and valence band (VB) again to be thermalized, generating a gain in photocurrent. Thus, our D-nMAG-based line array image sensor exhibits high-resolution infrared imaging of the target. This device displays a high responsivity at room temperature within a broad-spectrum region, i.e., 0.156 A/W @ 900 nm in the near-infrared (NIR) region and 3.7 mA/W @ 4 μm in the mid-infrared (MIR) region. Our work provides a carbon nanofilm for IR detection at a broad-spectrum region, with tunable defective structure, uniform thickness, and wafer-scale production.
Defect-induced Photocurrent Gain for Carbon Nanofilm-based Broadband Infrared Photodetector
Our work provides a carbon nanofilm for IR detection at a broad-spectrum region, with tunable defective structure, uniform thickness, and wafer-scale production.
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Prof. Yang Xu is a Fellow of the Institute of Physics (FInstP, IOP Fellow), IEEE NTC Distinguished Lecturer and IEEE Senior Member of the Electron Devices Society. He received his B.S. degree in Institute of Microelectronics at Department of ECE from Tsinghua University, M.S. and Ph.D. degrees in ECE from the University of Illinois Urbana-Champaign (UIUC), USA. He is now a full professor at the School of Micro-Nano Electronics, Zhejiang University, China. He was also a visiting by-Fellow of Churchill College at the University of Cambridge, UK, and a visiting professor at the University of California Los Angles (UCLA). He has published more than 120 papers including Nature Nanotechnology, Nature Electronics, Nature Photonics, Chemical Reviews, Advanced Materials, Chemical Society Reviews, Nature Communications, Nano Letters, ACS Nano, and IEDM,etc. He holds over 30 granted patents and gave more than 50 talks in international conferences. He is also served as Associate Editor of IEEE Nanotechnology Magazine, Microelectronics Journal, Micro & Nano Letters, and IET Circuits, Devices & Systems, Advisory Panel Member of IOP Nanotechnology, and was TPC committee members of IEEE-EDTM, IEEE-IPFA, and IEEE-EDAPS conferences. His research interests include emerging 2D/3D integrated optoelectronic devices for Internet-of-Things and Post-Moore Ubiquitous Electronics.
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