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Influence of MoS2-metal interface on charge injection: a comparison between various metal contacts
Li M(李萌)1,2; Lan, Fei3; Yang WG(杨文广)4; Ji, Zongwei5; Zhang Y(张嵛)6; Xin, Xiaoning1; Jin, Xiaoshi1; Li GY(李广勇)3
Department机器人学研究室
Source PublicationNANOTECHNOLOGY
ISSN0957-4484
2020
Volume31Issue:39Pages:1-13
Indexed BySCI ; EI
EI Accession number20203509099875
WOS IDWOS:000552682600001
Contribution Rank1
Funding Organization2019 Science Research Fund Project of Liaoning Provincial Department of Education [LQGD2019015] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2019M661124, 2019M651163] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [U16132220, 61604019, 61903359, 91748212] ; Talent Introduction Scientific Research Project of Changchun Normal University, China [RC2016009]
KeywordMoS2 contact interface KPFM charge injection
Abstract

Achieving good contacts is vital for harnessing the fascinating properties of two-dimensional (2D) materials. However, unsatisfactory 2D material-metal interfaces remain a problem that hinders the successful application of 2D materials for fabricating nanodevices. In this study, Kelvin probe force microscopy (KPFM) and other high-resolution microscopy techniques are utilized to characterize the surface morphology and contact interface between MoS2 and common metals including Au, Ti, Pd, and Ni. Surface potential information, including the contact potential difference (V-CPD) and surface potential difference (Delta V-CPD) of each MoS2-metal contact, is obtained. By comparing the surface potential distribution mappings with and without illumination, non-zero surface photovoltage (SPV) values and evident shift with amplitudes of 32 mV and 44 mV are observed for MoS2-Au and Ti, but not for MoS2-Pd and Ni. The Schottky barrier heights of MoS2-Au, Ti, Pd, and Ni are roughly evaluated from their I-V curves. Raman spectroscopy is also carried out to ensure more convincing results. All the results suggest that a smoother MoS2-metal interface results in better charge transport behaviors. Our analysis of the underlying mechanism and experimental findings offer a new perspective to better understand MoS2-metal contacts and underscore the fundamental importance of interface morphology for MoS2-based devices.

Language英语
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS KeywordMOS2 TRANSISTORS ; MONOLAYER MOS2 ; WORK FUNCTION ; GRAPHENE ; LAYER
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
Funding Project2019 Science Research Fund Project of Liaoning Provincial Department of Education[LQGD2019015] ; China Postdoctoral Science Foundation[2019M661124] ; China Postdoctoral Science Foundation[2019M651163] ; National Natural Science Foundation of China[U16132220] ; National Natural Science Foundation of China[61604019] ; National Natural Science Foundation of China[61903359] ; National Natural Science Foundation of China[91748212] ; Talent Introduction Scientific Research Project of Changchun Normal University, China[RC2016009]
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Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/27475
Collection机器人学研究室
Corresponding AuthorLi M(李萌)
Affiliation1.College of Information Science and Engineering, Shenyang University of Technology, Shenyang, China
2.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China
3.Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, United States of America
4.School of Electromechanical and Automotive Engineering, Yantai University, Yantai, China
5.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
6.Department of Computer Science and Technology, Changchun Normal University, Changchun, China
7.Department of Industrial & Manufacturing Systems Engineering, University of Hong Kong, Pokfulam, Hong Kong
Recommended Citation
GB/T 7714
Li M,Lan, Fei,Yang WG,et al. Influence of MoS2-metal interface on charge injection: a comparison between various metal contacts[J]. NANOTECHNOLOGY,2020,31(39):1-13.
APA Li M.,Lan, Fei.,Yang WG.,Ji, Zongwei.,Zhang Y.,...&Li GY.(2020).Influence of MoS2-metal interface on charge injection: a comparison between various metal contacts.NANOTECHNOLOGY,31(39),1-13.
MLA Li M,et al."Influence of MoS2-metal interface on charge injection: a comparison between various metal contacts".NANOTECHNOLOGY 31.39(2020):1-13.
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