Electronic bandgap manipulation of monolayer WS2 by vertically coupled insulated Mg(OH)2 layers

Fang Wang; Anyang Cui; Huimin Sun; Bin Zhou; Liping Xu; Kai Jiang; Liyan Shang; Zhigao Hu; Junhao Chu

doi:10.1016/j.jallcom.2019.01.129

Electronic bandgap manipulation of monolayer WS₂ by vertically coupled insulated Mg(OH)₂ layers

Fang Wang
, Anyang Cui
, Huimin Sun
, Bin Zhou
, Liping Xu
, Kai Jiang
, Liyan Shang
, Zhigao Hu^*
, Junhao Chu

^*Corresponding author for this work

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Searching for novel two-dimensional (2D) materials with tunable electrical and optical properties is significant to develop next-generation multifunctional nanoscale optoelectronic devices. The new insulated Mg(OH)₂ is a promising and stable 2D material to construct heterojunction with transition metal dichalcogenides (TMDs). Here, WS₂-Mg(OH)₂ is experimentally designed and investigated. The similarity of lattice constants for the two materials is confirmed with selected area electron diffraction for the first time. By stacking Mg(OH)₂ layers on WS₂ monolayer, the Fermi level of WS₂ is distinctly elevated, making the WS₂-Mg(OH)₂ a promising heterostructure for constructing and optimizing tunable electronic devices. We also showed the adjustable transition properties with enhanced coupling effect by thinning the Mg(OH)₂ layers in the heterostructure. This study not only demonstrates the tunable Fermi levels and optical characteristics of WS₂-Mg(OH)₂, but also could promote the broad investigations of novel 2D materials for various optoelectronic device applications in nanoscale.

Original language	English
Pages (from-to)	156-162
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	785
DOIs	https://doi.org/10.1016/j.jallcom.2019.01.129
State	Published - 15 May 2019

Keywords

Fermi level
Heterostructures
Mg(OH)
WS

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10.1016/j.jallcom.2019.01.129

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title = "Electronic bandgap manipulation of monolayer WS2 by vertically coupled insulated Mg(OH)2 layers",

abstract = "Searching for novel two-dimensional (2D) materials with tunable electrical and optical properties is significant to develop next-generation multifunctional nanoscale optoelectronic devices. The new insulated Mg(OH)2 is a promising and stable 2D material to construct heterojunction with transition metal dichalcogenides (TMDs). Here, WS2-Mg(OH)2 is experimentally designed and investigated. The similarity of lattice constants for the two materials is confirmed with selected area electron diffraction for the first time. By stacking Mg(OH)2 layers on WS2 monolayer, the Fermi level of WS2 is distinctly elevated, making the WS2-Mg(OH)2 a promising heterostructure for constructing and optimizing tunable electronic devices. We also showed the adjustable transition properties with enhanced coupling effect by thinning the Mg(OH)2 layers in the heterostructure. This study not only demonstrates the tunable Fermi levels and optical characteristics of WS2-Mg(OH)2, but also could promote the broad investigations of novel 2D materials for various optoelectronic device applications in nanoscale.",

keywords = "Fermi level, Heterostructures, Mg(OH), WS",

author = "Fang Wang and Anyang Cui and Huimin Sun and Bin Zhou and Liping Xu and Kai Jiang and Liyan Shang and Zhigao Hu and Junhao Chu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = may,

day = "15",

doi = "10.1016/j.jallcom.2019.01.129",

language = "英语",

volume = "785",

pages = "156--162",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Electronic bandgap manipulation of monolayer WS2 by vertically coupled insulated Mg(OH)2 layers

AU - Wang, Fang

AU - Cui, Anyang

AU - Sun, Huimin

AU - Zhou, Bin

AU - Xu, Liping

AU - Jiang, Kai

AU - Shang, Liyan

AU - Hu, Zhigao

AU - Chu, Junhao

PY - 2019/5/15

Y1 - 2019/5/15

N2 - Searching for novel two-dimensional (2D) materials with tunable electrical and optical properties is significant to develop next-generation multifunctional nanoscale optoelectronic devices. The new insulated Mg(OH)2 is a promising and stable 2D material to construct heterojunction with transition metal dichalcogenides (TMDs). Here, WS2-Mg(OH)2 is experimentally designed and investigated. The similarity of lattice constants for the two materials is confirmed with selected area electron diffraction for the first time. By stacking Mg(OH)2 layers on WS2 monolayer, the Fermi level of WS2 is distinctly elevated, making the WS2-Mg(OH)2 a promising heterostructure for constructing and optimizing tunable electronic devices. We also showed the adjustable transition properties with enhanced coupling effect by thinning the Mg(OH)2 layers in the heterostructure. This study not only demonstrates the tunable Fermi levels and optical characteristics of WS2-Mg(OH)2, but also could promote the broad investigations of novel 2D materials for various optoelectronic device applications in nanoscale.

AB - Searching for novel two-dimensional (2D) materials with tunable electrical and optical properties is significant to develop next-generation multifunctional nanoscale optoelectronic devices. The new insulated Mg(OH)2 is a promising and stable 2D material to construct heterojunction with transition metal dichalcogenides (TMDs). Here, WS2-Mg(OH)2 is experimentally designed and investigated. The similarity of lattice constants for the two materials is confirmed with selected area electron diffraction for the first time. By stacking Mg(OH)2 layers on WS2 monolayer, the Fermi level of WS2 is distinctly elevated, making the WS2-Mg(OH)2 a promising heterostructure for constructing and optimizing tunable electronic devices. We also showed the adjustable transition properties with enhanced coupling effect by thinning the Mg(OH)2 layers in the heterostructure. This study not only demonstrates the tunable Fermi levels and optical characteristics of WS2-Mg(OH)2, but also could promote the broad investigations of novel 2D materials for various optoelectronic device applications in nanoscale.

KW - Fermi level

KW - Heterostructures

KW - Mg(OH)

KW - WS

UR - https://www.scopus.com/pages/publications/85060206244

U2 - 10.1016/j.jallcom.2019.01.129

DO - 10.1016/j.jallcom.2019.01.129

M3 - 文章

AN - SCOPUS:85060206244

SN - 0925-8388

VL - 785

SP - 156

EP - 162

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Electronic bandgap manipulation of monolayer WS₂ by vertically coupled insulated Mg(OH)₂ layers

Abstract

Keywords

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