Ultrafast charge transfer in dual graphene-WS2 van der Waals quadrilayer heterostructures☆ ☆ Supported by the National Key Research and Development Program under Grant No 2016YFA0401100, the National Natural Science Foundation of China under Grant No 61575129, the National High Technology Research and Development Program of China under Grant No 2015AA021102, and the Major Science and Technology Project of Guangdong Province under Grant No 2140B010131006

Using dual graphene-WS2 quadrilayer heterostructures as an example, we find that the ultrafast transfer of electrons from WS2 to graphene takes place within 114 fs, and the Coulomb field of the charge can effectively affect the interlayer electron transfer. This effect illustrates that the charge tr...

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Bibliographic Details
Published in:Chinese physics letters 2018-12, Vol.35 (12)
Main Authors: Song, Zong-Peng, Zhu, Hai-Ou, Shi, Wen-Tao, Sun, Da-Lin, Ruan, Shuang-Chen
Format: Article
Language:English
Online Access:Get full text
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Summary:Using dual graphene-WS2 quadrilayer heterostructures as an example, we find that the ultrafast transfer of electrons from WS2 to graphene takes place within 114 fs, and the Coulomb field of the charge can effectively affect the interlayer electron transfer. This effect illustrates that the charge transfer in such van der Waals heterostructures may be controlled by an externally applied electric field for promising applications in photoelectric devices.
ISSN:0256-307X
DOI:10.1088/0256-307X/35/12/127801