Fast and broadband MoS_(2)photodetectors by coupling WO_(3-x)semi-metal nanoparticles underneath  

作　　者：Qianqian Wu Chenglin Wang Li Li Xinlei Zhang Yanfeng Jiang Zhengyang Cai Liangliang Lin Zhenhua Ni Xiaofeng Gu Kostya(Ken)Ostrikov Haiyan Nan Shaoqing Xiao 

机构地区：[1]Engineering Research Center of IoT Technology Applications(Ministry of Education),Department of Electronic Engineering,Jiangnan University,Wuxi 214122,China [2]Department of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China [3]School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China [4]School of Physics and Chemistry and QUT Centre for Materials Science,Queensland University of Technology(QUT),Brisbane,Queensland 4000,Australia

出　　处：《Journal of Materials Science & Technology》2024年第26期217-225,共9页材料科学技术(英文版)

基　　金：supported by the National Nature Sci-ence Foundation under Grant Nos.62074070,52203356,52004102,and 62104084;the Natural Science Foundation of Jiangsu Province,China under Grant Nos.BK20221534 and BK20221065;the Na-tional Postdoctoral Foundation under Grants No.2018M642154;the Postdoctoral Foundation of Jiangsu Province,China under No.2018K057B;the Postgraduate Research&Practice Innovation Program of Jiangsu Province,China under No.KYCX23_2448;the 111 Project under Grant No.B23008.

摘　　要：Coupling two-dimensional(2D)materials with plasmonic nanoparticles(NPs)holds great potential for enhancing the photodetection performance in 2D photodetectors.However,there are limitations in the detection spectral range and response speed of plasmonic 2D photodetectors based on transition metal dichalcogenides(TMDs)like MoS_(2).We have developed a fast and broadband MoS_(2)photodetector(denoted as MoS_(2)/WO_(3-x))by coupling semi-metal sub-stoichiometric WO_(3-x)NPs beneath,in contrast to traditional WO_(3-x)/MoS_(2)photodetectors with the opposite positions of MoS_(2)and WO_(3-x)NPs.The photodetection performance is 10 times higher than the WO_(3-x)/MoS_(2)structure,and 100 times higher than the pristine MoS_(2)device,broadening the spectrum to near-infrared(NIR),achieving a maximum responsivity and detectivity that can reach 1.8×10^(4)A W-1,4.62×10^(13)Jones,respectively,under 940 nm illumination.The response speed exceeds the state-of-the-art MoS_(2)photodetectors based on composite structures,unprecedentedly reaching the order of tens of microseconds.Theoretical understanding of WO_(3-x)NPs as well as light interaction with the MoS_(2)layer reveal that the exceptional photoelectric performance can be attributed to the synergistic effect of both the semimetal nature of the underneath WO_(3-x)NPs and the intact nature of the top MoS_(2)layer.The mechanism enhances optical absorption,expands the spectral range,and simultaneously speeds up optoelectronic effects.

关 键 词：WO_(3-x)nanoparticles Plasmonic MoS_(2)/WO_(3-x)photodetector Fast broadband 

分 类 号：TB3[一般工业技术—材料科学与工程]