Heterostructures of transition metal dichalcogenides

Amin, B.; Singh, Nirpendra; Schwingenschlögl, Udo

doi:10.1103/physrevb.92.075439

Cited by 215 publications

(135 citation statements)

References 49 publications

(62 reference statements)

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“…Also, the different structures of vertical and in‐plane heterostructures make their properties diverse. Amin et al theoretically reported that vertical and in‐plane MoS 2 –WS 2 , MoSe 2 –WSe 2 , and MoTe 2 –WTe 2 heterostructures exhibit obvious different electronic and optical properties . As for the electronic properties, all three vertical heterostructures have indirect bandgaps.…”

Section: D Tmd Heterostructuresmentioning

confidence: 99%

Various Structures of 2D Transition‐Metal Dichalcogenides and Their Applications

et al. 2018

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2D transition‐metal dichalcogenides (TMDs), which exhibit fascinating and fantastic properties, have promising applications in future electronic devices and photoelectric devices. Here, the recent research on 2D TMDs is summarized, including single components, 2D doped TMDs, and 2D van der Waals heterostructures. The physical picture, synthetic methods, and optoelectronic properties of these 2D materials are comprehensively described. Opportunities and emerging applications of 2D materials in the future are briefly discussed.

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Section: D Tmd Heterostructuresmentioning

confidence: 99%

Various Structures of 2D Transition‐Metal Dichalcogenides and Their Applications

et al. 2018

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“…[9][10][11][12][13] Although antimonene has not been experimentally verified up to now, there are many intriguing properties, obtainable through ab initio simulations, which require the attention of scientific community. The rise in interest of antimonene in photonics and optoelectronics is supported by the numerous applications of similar monolayer materials ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers.…”

Section: A Introductionmentioning

confidence: 99%

Antimonene: a monolayer material for ultraviolet optical nanodevices

et al. 2016

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Two-dimensional materials draw further attention because of their superior properties applicable in novel technologies. We have calculated the optical properties of α and β allotropes of antimonene monolayers. The dielectric matrix has been calculated within the random phase approximation (RPA) using density functional theory. We have calculated dielectric function, absorption coefficient, refractive index, electronic energy loss spectroscopy and optical reflectivity in the energy range between 0 and 21 eV. Our simulations predict that absorption process starts in the infrared, but peaks in the ultraviolet. Refractive indices are 2.3 (α-Sb) and 1.5 (β-Sb) at the zero energy limit and scale up to 3.6 in the ultraviolet. Reflection rises up to 86% at the UV energies, where antimonene behaves like a metal regarding the incident electromagnetic radiation. Our calculations show that antimonene is appropriate as a material for the microelectronic and optoelectronics nanodevices and solar cell applications, as well as new optical applications using various light emission, detection, modulation and manipulation functions.

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“…26 The EA of 2-propanol is unknown to the best of our knowledge, so we used that of isopropyl radical for calculating the electronegativity. 25 The electronegativity of TMDC (χ TMDC ) can be expressed as: 29,30 …”

mentioning

confidence: 99%

Understanding Solvent Effects on the Properties of Two-Dimensional Transition Metal Dichalcogenides

Choi

Zhang

et al. 2016

ACS Appl. Mater. Interfaces

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Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have emerged as attractive direct bandgap semiconducting materials with remarkable properties. Recently, TMDC-based electronic and optoelectronic systems have been demonstrated with various chemical doping and functionalization approaches for modulating their physical properties and enhancing device performances. However, the dependence of intrinsic properties of TMDCs on diverse solvents, which are used necessarily in fabrication processes and chemical doping, remains largely unaddressed. Here we report a charge transfer mechanism in TMDCs by commonly used solvents such as chloroform, toluene, acetone, and 2-propanol, which significantly changes the physical properties of monolayer MoS2 and WSe2. We find that the relative difference in electronegativity between solvents and TMDCs drives the transfer of electrons from or to the TMDCs, which results in photoluminescence (PL) enhancement or quenching depending on the change of carrier density in TMDCs. The analysis of exciton and trion spectral weights in MoS2 as a function of solvent electronegativity provides evidence of charge transfer. Finally, conductive atomic force microscopy (C-AFM) on TMDCs before and after immersion in the solvents further supports the charge transfer mechanism and resulting changes in carrier density. Our results highlight the importance of selection of solvents for solution-processed 2D TMDC devices and systems.

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Heterostructures of transition metal dichalcogenides

Cited by 215 publications

References 49 publications

Various Structures of 2D Transition‐Metal Dichalcogenides and Their Applications

Various Structures of 2D Transition‐Metal Dichalcogenides and Their Applications

Antimonene: a monolayer material for ultraviolet optical nanodevices

Understanding Solvent Effects on the Properties of Two-Dimensional Transition Metal Dichalcogenides

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