Asymmetric MXene/monolayer transition metal dichalcogenide heterostructures for functional applications

Baihai Li, Haoran Guo, Yunrui Wang, Wenxu Zhang, Qiuju Zhang, Liang Chen, Xiaoli Fan, Wanli Zhang, Yanrong Li, Woon Ming Lau

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29 引用 (Scopus)

摘要

A versatile two-dimensional (2D) molecular bilayer heterostructure of asymmetric MXene/monolayer transition metal dichalcogenide (aMXene/mTMDC) with a high interfacial built-in electric field is here simulated, where aMXene is an aMXene with the top or bottom electronegative atom plane of MXene removed. The asymmetric structural design of aMXene leads to a high dipole moment perpendicular to the 2D molecular plane. Although the unpassivated metal atoms in the aMXene are unstable and electropositive, coupling them to the electronegative chalcogenide atoms in an aMXene/mTMDC bilayer resolves this deficiency. The dipole field tunable by the specific composition of aMXene/mTMDC is leveraged to engineer unusual band structures, band alignments, and charge redistribution/injection in the bilayer. The simulated design of several aMXene/mTMDC bilayers for possible use in spintronics, microelectronics/optoelectronics, and catalysis/photocatalysis are shown.

源语言英语
文章编号16
期刊npj Computational Materials
5
1
DOI
出版状态已出版 - 1 12月 2019

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