Analysis of optical and electronic properties of MoS2 for optoelectronics and FET applications

Ullah, Muhammad Sana; Yousuf, Abdul Hamid Bin; Es-Sakhi, Azzedin; Chowdhury, Masud H.

doi:10.1063/1.5034320

Cited by 32 publications

(21 citation statements)

References 33 publications

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“…Multilayer MoS 2 has an indirect band gap of ∼1.3 eV and high visible light absorption. 43,44 Raman spectroscopy measurements of the free-standing and supported parts of the MoS 2 flake are shown in Figure 1d; the characteristic peaks of the in-plane (E 2g ) mode located at ≈384 cm −1 and the out-of-plane (A 1g ) mode located at ≈408 cm −145 indicate that the substrate-supported and free-standing MoS 2 flakes are 2H-phase. 46 Note that there is no indication of partial 2H-1T′ phase transition that has been previously reported in suspended MoS 2 monolayers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Free-Standing Multilayer Molybdenum Disulfide Memristor for Brain-Inspired Neuromorphic Applications

Abnavi

Ahmadi

Hasani

et al. 2021

ACS Appl. Mater. Interfaces

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Recently, atomically thin two-dimensional (2D) transition-metal dichalcogenides (TMDs) have attracted great interest in electronic and opto-electronic devices for highintegration-density applications such as data storage due to their small vertical dimension and high data storage capability. Here, we report a memristor based on free-standing multilayer molybdenum disulfide (MoS 2 ) with a high current on/off ratio of ∼10 3 and a stable retention for at least 3000 s. Through light modulation of the carrier density in the suspended MoS 2 channel, the on/off ratio can be further increased to ∼10 5 . Moreover, the essential photosynaptic functions with short-and long-term memory (STM and LTM) behaviors are successfully mimicked by such devices. These results also indicate that STM can be transferred to LTM by increasing the light stimuli power, pulse duration, and number of pulses. The electrical measurements performed under vacuum and ambient air conditions propose that the observed resistive switching is due to adsorbed oxygen and water molecules on both sides of the MoS 2 channel. Thus, our free-standing 2D multilayer MoS 2 -based memristors propose a simple approach for fabrication of a low-power-consumption and reliable resistive switching device for neuromorphic applications.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Free-Standing Multilayer Molybdenum Disulfide Memristor for Brain-Inspired Neuromorphic Applications

Abnavi

Ahmadi

Hasani

et al. 2021

ACS Appl. Mater. Interfaces

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“…The effect of varying sulfurization temperature on the annealing of MoO 3 film has been studied in detail to obtain 2D MoS 2 films spanning a large area for nanoelectronic applications such as ferroelectric FETs (FeFET) memory (37) . Utilizing the optical properties of MoS 2 appropriately, an MoS 2 based photodetector has the ability to detect photons in the visible range (38) . MoS 2 based optoelectronic devices, when irradiated with UV -visible light, display useful properties for application in room-temperature optoelectronic NO 2 sensors.…”

Section: Applicationsmentioning

confidence: 99%

Structural analysis of the chemical vapour deposition grown molybdenum disulphide nanofilms for multifaceted applications

Saini¹

2020

IJST

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Background/Objectives: In recent years, the research on molybdenum disulphide (MoS 2 ) has gained significance because of its unique properties and ease of incorporation in hybrid structures, which makes it one of the most suitable materials for devices and multifaceted Applications. The objective of the study is to synthesize MoS 2 nanofilms and then to characterize them through X-ray diffraction (XRD) technique. Methods: In this study, MoS 2 nanofilms are synthesized on silicon dioxide substrates by the thermal Chemical Vapour Deposition (CVD) technique, where molybdenum trioxide (MoO 3 ) (VI) powder and sulphur (S) flakes are used as precursors. Findings: X-ray diffraction (XRD) measurements have been carried out for the thermal CVD grown MoS 2 nanofilm samples. Further, the observed XRD data has been analyzed and the structural analysis of synthesized MoS 2 nanofilms is presented in this report. Furthermore, the experimentally observed findings are compared with the standard findings and shown that they are resembling closely. Novelty/Applications: In order to highlight the scope of our work, the important applications, of the molybdenum disulphide nanostructures are also discussed, that make MoS 2 nanostructures attractive candidates in fields as diverse as energy, environmental, biomedical and semiconductors.

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“…The nonlinear energy shift and broadening depend on the coefficients χ and χ (both real-valued), which are calculated using the results in [19,21,23,24] (see the detailed derivation in Appendix B):…”

Section: Nonlinear Oscillatormentioning

confidence: 99%

“…The nonlinear optical material, namely MoS 2 in our case, is embedded into a background material such as the hexagonal boron nitride that fills the space. The refractive index of MoS 2 at 1.06 eV is calculated through DFT method [23] to be 2.2. The refractive index of the hexagonal boron nitride is also found to be 2.2 [24].…”

Section: Appendix B Nonlinear Coefficient χ χ and Unperturbed Hamilto...mentioning

confidence: 99%

Nonlinear optical response of a local surface plasmon coupled to a 2D material

Soh

Yanagimoto²,

Chatterjee³

et al. 2019

Preprint

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We present a theoretical study of the optical response of a nonlinear oscillator formed by coupling a metal nanoparticle local surface plasmon resonance to excitonic degrees of freedom in a monolayer transition-metal dichalcogenide. We show that the combined system should exhibit strong anharmonicity in its low-lying states, predicting for example a seven order-of-magnitude increase in nonlinearity relative to a silicon photonic crystal cavity. Then, we demonstrate that such system exhibits strong quantum features such as antibunching and non-Gaussianity. Arrays of such nanoscale nonlinear oscillators could be used to realize novel optical metamaterials; alternatively, an individual nanoparticle-monolayer construct could be coupled to an optical resonator to mediate efficient input-output coupling to propagating fields.

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Analysis of optical and electronic properties of MoS2 for optoelectronics and FET applications

Cited by 32 publications

References 33 publications

Free-Standing Multilayer Molybdenum Disulfide Memristor for Brain-Inspired Neuromorphic Applications

Free-Standing Multilayer Molybdenum Disulfide Memristor for Brain-Inspired Neuromorphic Applications

Structural analysis of the chemical vapour deposition grown molybdenum disulphide nanofilms for multifaceted applications

Nonlinear optical response of a local surface plasmon coupled to a 2D material

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