In this letter, van der Waals heterostructures (vdWHs) assembled by molybdenum disulfide (MoS2) and graphene monolayers are used as an experimental prototype to study the interaction between two-dimensional (2D) semiconducting and semimetal materials. The electron redistribution and energy transfer in graphene/MoS2 vdWHs are demonstrated by the combination of electrical measurements (Dirac-point shift) and Raman analyses. In graphene, the linear dispersive Dirac fermions can resonate with various-frequency “photons,” which “emit” from optically active MoS2 by the recombination of in-plane excitons. The experimental finding suggests that the photon-induced charge separation and accumulation might be in a low degree, thus affecting the performance of semiconductor/graphene-based 2D optoelectronic devices.
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Electron redistribution and energy transfer in graphene/MoS2 heterostructure
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18 March 2019
Research Article|
March 21 2019
Electron redistribution and energy transfer in graphene/MoS2 heterostructure
Weiyi Lin
;
Weiyi Lin
a)
1
Department of Physics, Xiamen University
, Xiamen, Fujian 361005, China
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
a)Author to whom correspondence should be addressed: wwcai@xmu.edu.cn
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Pingping Zhuang;
Pingping Zhuang
1
Department of Physics, Xiamen University
, Xiamen, Fujian 361005, China
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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Harry Chou;
Harry Chou
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
3
Texas Materials Institute, The University of Texas at Austin
, Austin, Texas 78712, USA
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Yuqian Gu;
Yuqian Gu
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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Richard Roberts;
Richard Roberts
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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Wei Li;
Wei Li
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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Sanjay K. Banerjee;
Sanjay K. Banerjee
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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Weiwei Cai;
Weiwei Cai
a)
1
Department of Physics, Xiamen University
, Xiamen, Fujian 361005, China
a)Author to whom correspondence should be addressed: wwcai@xmu.edu.cn
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Deji Akinwande
Deji Akinwande
2
Department of Electrical and Computer Engineering, Microelectronic Research Center, The University of Texas at Austin
, Austin, Texas 78758, USA
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a)Author to whom correspondence should be addressed: wwcai@xmu.edu.cn
Appl. Phys. Lett. 114, 113103 (2019)
Article history
Received:
January 10 2019
Accepted:
March 02 2019
Citation
Weiyi Lin, Pingping Zhuang, Harry Chou, Yuqian Gu, Richard Roberts, Wei Li, Sanjay K. Banerjee, Weiwei Cai, Deji Akinwande; Electron redistribution and energy transfer in graphene/MoS2 heterostructure. Appl. Phys. Lett. 18 March 2019; 114 (11): 113103. https://doi.org/10.1063/1.5088512
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