Atomically thin MoS2: a new direct-gap semiconductor
TLDR
The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy and the effect of quantum confinement on the material's electronic structure is traced.Abstract:
The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy Through characterization by absorption, photoluminescence, and photoconductivity spectroscopy, we trace the effect of quantum confinement on the material's electronic structure With decreasing thickness, the indirect band gap, which lies below the direct gap in the bulk material, shifts upwards in energy by more than 06 eV This leads to a crossover to a direct-gap material in the limit of the single monolayer Unlike the bulk material, the MoS₂ monolayer emits light strongly The freestanding monolayer exhibits an increase in luminescence quantum efficiency by more than a factor of 10⁴ compared with the bulk materialread more
Citations
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Few-Layer MoS2: A Promising Layered Semiconductor
Rudren Ganatra,Qing Zhang +1 more
TL;DR: This review attempts to provide an overview of the research relevant to the structural and physical properties, fabrication methods, and electronic devices of few-layer MoS2.
Journal ArticleDOI
2D Transition‐Metal‐Dichalcogenide‐Nanosheet‐Based Composites for Photocatalytic and Electrocatalytic Hydrogen Evolution Reactions
TL;DR: Recent progress in photocatalytic and electrocatalytic HERs using 2D TMD-based composites as catalysts is discussed.
Journal ArticleDOI
Exploring atomic defects in molybdenum disulphide monolayers
Jinhua Hong,Zhixin Hu,Matt Probert,Kun Li,Danhui Lv,Xin-an Yang,Lin Gu,Nannan Mao,Qingliang Feng,Liming Xie,Jin Zhang,Dianzhong Wu,Zhiyong Zhang,Chuanhong Jin,Wei Ji,Wei Ji,Xixiang Zhang,Jun Yuan,Jun Yuan,Ze Zhang +19 more
TL;DR: A comprehensive joint experiment–theory investigation of point defects in monolayer molybdenum disulphide prepared by mechanical exfoliation, physical and chemical vapour deposition and influence of defects on electronic structure and charge-carrier mobility is predicted by calculation and observed by electric transport measurement.
Journal ArticleDOI
Mixed-dimensional van der Waals heterostructures
TL;DR: In this paper, a survey of mixed-dimensional van der Waals (vdw) heterostructures is presented, where 2D materials with non-2D materials adhere primarily through non-covalent interactions.
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Multi-terminal transport measurements of MoS2 using a van der Waals heterostructure device platform.
Xu Cui,Gwan Hyoung Lee,Young Duck Kim,Ghidewon Arefe,Pinshane Y. Huang,Chul Ho Lee,Daniel Chenet,Xiangwei Zhang,Lei Wang,Fan Ye,Filippo Pizzocchero,Bjarke Sørensen Jessen,Kenji Watanabe,Takashi Taniguchi,David A. Muller,Tony Low,Philip Kim,James Hone +17 more
TL;DR: Modelling of potential scattering sources and quantum lifetime analysis indicate that a combination of short-range and long-range interfacial scattering limits the low-temperature mobility of MoS2.
References
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Journal ArticleDOI
Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
TL;DR: Graphene is established as the strongest material ever measured, and atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime.
Journal ArticleDOI
Two-dimensional atomic crystals
Kostya S. Novoselov,Da Jiang,Fred Schedin,Timothy J. Booth,V. V. Khotkevich,Sergey V. Morozov,Andre K. Geim +6 more
TL;DR: By using micromechanical cleavage, a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides are prepared and studied.
Journal ArticleDOI
Emerging Photoluminescence in Monolayer MoS2
Andrea Splendiani,Liang Sun,Yuanbo Zhang,Tianshu Li,Jonghwan Kim,Chi-Yung Chim,Giulia Galli,Feng Wang,Feng Wang +8 more
TL;DR: This observation shows that quantum confinement in layered d-electron materials like MoS(2), a prototypical metal dichalcogenide, provides new opportunities for engineering the electronic structure of matter at the nanoscale.
Journal ArticleDOI
Anomalous lattice vibrations of single- and few-layer MoS2.
TL;DR: This work exemplifies the evolution of structural parameters in layered materials in changing from the three-dimensional to the two-dimensional regime by characterized by Raman spectroscopy.
Journal ArticleDOI
The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties
J.A. Wilson,A.D. Yoffe +1 more
TL;DR: The transition metal dichalcogenides are about 60 in number as discussed by the authors, and two-thirds of these assume layer structures and can be cleaved down to less than 1000 A and are then transparent in the region of direct band-to-band transitions.