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Improving the device performances of two-dimensional semiconducting transition metal dichalcogenides: Three strategies

查看全文 作　　者：Mo [1]Cheng;Junbo [1]Yang;Xiaohui [1]Li;Hui [1]Li;Ruofan [1]Du;Jianping [1]Shi;Jun [2]He 高影响力作者 机构地区：[1]The Institute for Advanced Studies,Wuhan University,Wuhan 430072,China;[2]Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education,School of Physics and Technology,Wuhan University,Wuhan 430072,China高影响力机构 出　　处：《Frontiers of physics》索引2022年第17卷第6期,共16页高影响力期刊 基　　金：supported by the National Key R&D Program of China(Grant Nos.2018YFA0703700 and 2021YFA1200800);the National Natural Science Foundation of China(Grant Nos.91964203 and 92164103);the Beijing National Laboratory for Molecular Sciences(Grant No.BNLMS202001);the Fundamental Research Funds for the Central Universities(Grant No.2042021kf0029). 摘　　要：Two-dimensional(2D)semiconductors are emerging as promising candidates for the next-generation nanoelectronics.As a type of unique channel materials,2D semiconducting transition metal dichalcogenides(TMDCs),such as MoS2 and WS2,exhibit great potential for the state-of-the-art fieldeffect transistors owing to their atomically thin thicknesses,dangling-band free surfaces,and abundant band structures.Even so,the device performances of 2D semiconducting TMDCs are still failing to reach the theoretical values so far,which is attributed to the intrinsic defects,excessive doping,and daunting contacts between electrodes and channels.In this article,we review the up-to-date three strategies for improving the device performances of 2D semiconducting TMDCs:(i)the controllable synthesis of wafer-scale 2D semiconducting TMDCs single crystals to reduce the evolution of grain boundaries,(ii)the ingenious doping of 2D semiconducting TMDCs to modulate the band structures and suppress the impurity scatterings,and(iii)the optimization design of interfacial contacts between electrodes and channels to reduce the Schottky barrier heights and contact resistances.In the end,the challenges regarding the improvement of device performances of 2D semiconducting TMDCs are highlighted,and the further research directions are also proposed.We believe that this review is comprehensive and insightful for downscaling the electronic devices and extending the Moore’s law. 关 键 词：2D semiconductor transition metal dichalcogenides waferscale single crystal ingenious doping interfacial contact device performance
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