Optical identification of interlayer coupling of graphene/MoS2 van der Waals heterostructures

Yang, Mingming1,2; Wang, Longlong1,2; Hu, Guofeng3; Chen, Xue4; Gong, Peng Lai5; Cong, Xin4; Liu, Yi1,2; Yang, Yuanbo1,2; Li, Xiaoli1,2; Zhao, Xiaohui1,2; Liu, Xuelu4

2021

10.1007/s12274-020-3215-9

Nano Research   影响因子和分区

1998-0124

1998-0000

The interlayer coupling in van der Waals (vdW) heterostructures (vdWHs) is at the frontier of the fundamental research, underlying many optical behaviors. The graphene/MoS2 vdWHs provide an ideal platform to reveal the good interfacial coupling between graphene and MoS2 constituents. Here, three groups of graphene/MoS2 vdWHs were prepared by transferring 1-3 layers of graphene onto monolayer MoS2. The interlayer coupling within graphene/MoS2 vdWHs were characterized and analyzed by Raman spectroscopy, photoluminescence (PL) spectroscopy and optical contrast (OC) spectroscopy. The upshift of the A(1g) peak of MoS2 and the upshift of the D and 2D peaks of SLG show that the electrons move from MoS2 to graphene accompanied by the dielectric shielding effect on graphene. The weakened PL intensities and the slight red shift of A peak prove that the electrons move from MoS2 to graphene meanwhile the recombination of hole and electron pairs is blocked in vdWHs. Our results deepen the understanding of the interlayer coupling of graphene/MoS2 vdWHs and therefore provide guidelines for the practical design and application of optoelectronic devices based on graphene/MoS2 vdWHs.

graphene/MoS2 vdWHs Raman spectroscopy PL spectroscopy OC spectroscopy dielectric shielding effect interlayer coupling

SCI ; EI

英语

其他

NSFC[11904154] ; Hebei Province Natural Science Foundation[A2020201028]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000613092200003

TSINGHUA UNIV PRESS

20210509856689

Layered semiconductors ; Molybdenum compounds ; Optoelectronic devices ; Photoluminescence spectroscopy ; Red Shift ; Van der Waals forces

Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Products Generally:804

Web of Science

1.Hebei Univ, Coll Phys Sci & Technol, Natl Local Joint Engn Lab New Energy Photoelect D, Baoding 071002, Peoples R China
2.Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China
3.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
4.Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Yang, Mingming,Wang, Longlong,Hu, Guofeng,et al. Optical identification of interlayer coupling of graphene/MoS2 van der Waals heterostructures[J]. Nano Research,2021,14:2241-2246.

Yang, Mingming.,Wang, Longlong.,Hu, Guofeng.,Chen, Xue.,Gong, Peng Lai.,...&Liu, Xuelu.(2021).Optical identification of interlayer coupling of graphene/MoS2 van der Waals heterostructures.Nano Research,14,2241-2246.

Yang, Mingming,et al."Optical identification of interlayer coupling of graphene/MoS2 van der Waals heterostructures".Nano Research 14(2021):2241-2246.