Low pressure sulfurization and characterization of multilayer MoS2 for potential applications in supercapacitors

Ghosh, Sampad; Withanage, Sajeevi S.; Chamlagain, Bhim; Khondaker, Saiful I.; Harish, Sivasankaran; Saha, Bidyut Baran

doi:10.1016/j.energy.2020.117918

Cited by 24 publications

(19 citation statements)

References 24 publications

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“…The increase in the Raman peak intensity with the flow of H 2 gas can be attributed to the improvement in crystal structure of MoS 2 thin films. This structural Figure 4b reveals the prominent photoluminescence (PL) peak corresponding to the energy gap around 1.75 eV is observed, which is in consistent with the reported values for few layers of MoS 2 [49][50][51][52][53]. This can be attributed to presence of tensile strain, which increases the interlayer distance and results in weak interlayer coupling in few layers of MoS 2 .…”

Section: Resultssupporting

confidence: 88%

“…This can be attributed to presence of tensile strain, which increases the interlayer distance and results in weak interlayer coupling in few layers of MoS 2 . The increased interlayer distance in few layers of MoS 2 is assumed as stacking of few monolayers, which emits higher intensity PL peak as compared to monolayer at the same wavelength [54]. The monolayer like nature in a multilayer MoS 2 bubble structure has been observed by Luo et al [55].…”

Section: Resultsmentioning

confidence: 87%

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Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films

Pradhan

Gartia

Ghosh

et al. 2021

Micro & Nano Letters

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MoS 2 has gained tremendous interest due to its highlighting electronic and optoelectronic properties. In this work, an attempt has been made to develop a CMOS compatible process for the fabrication of a MoS 2 thin film. In the first step, molybdenum (Mo) thin film was deposited on silicon substrate by RF magnetron sputtering. In the second step, chemical vapor deposition (CVD) was used for the synthesis of MoS 2 using a custom-designed dual zone tubular furnace. The impact of hydrogen (H 2 ) on the CVD growth of MoS 2 thin film was studied with the mixture of H 2 and argon (Ar) gas in 1:10 ratio. AFM and FESEM images revealed a uniform and smooth growth of MoS 2 films using H 2 as a reducing gas. Raman characteristics peaks, observed at 386 cm −1 and 408 cm −1 , have confirmed the formation of MoS 2 film, which corresponds to the hexagonal coordination (2H). The intensity of photoluminescence peak of MoS 2 thin film is found to be increased with hydrogen treatment. Moreover, the impact of H 2 gas was systematically studied on the electrical properties and a reduction in the carrier concentration of MoS 2 was observed with a flow of 20 sccm H 2 . A detailed study on the impact of H 2 gas and MoS 2 /Si heterojunction properties were also performed.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 87%

Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films

Pradhan

Gartia

Ghosh

et al. 2021

Micro & Nano Letters

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Section: Synthesis Methodologiesmentioning

confidence: 99%

“…[86] CVD is usually the coating/deposition technique for versatile materials, which combines the chemical reaction of evaporated precursors on substrates at high temperatures. [87,88] Ghosh et al deposited the MoS 2 thin film (Figure 2b) on Si/SiO 2 at temperatures of 700, 750, and 850 C. Both crucibles, containing the Mo and S sources, were placed inside and Ar gas was used as a carrier; then, sulfurization was conducted for 3 h under a vacuum of 200 mTorr to obtain a thin film of MoS 2 [89] Microwave is an environment-friendly chemical synthesis method for nanoparticles (electromagnetic wave ranges from 1 mm to 1 m), which reduces the activation energy of precursors and stimulates the synthesis process. Microwave energy is well organized in heating processes than conventional heating.…”

Section: Synthesis Of Individual Metal Sulfidesmentioning

confidence: 99%

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Design of Metals Sulfides with Carbon Materials for Supercapacitor Applications: A Review

Iqbal

Ashiq

2021

Energy Tech

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Supercapacitors are very exclusive among energy‐storage devices for the wearable and portable industry. Due to simplicity, abundance occurrence, good electrical conductivity, and rich redox states, metal sulfides have a significant impact in supercapacitor applications in the present decade. Sulfur is the anion, associated with metal cations, and provides substantial tunable electrochemical, electrical, physical, and chemical properties in metal sulfides. In addition, carbonaceous materials enhance the electrochemical characteristics of metal sulfides synergistically for supercapacitors. Fast and scalable synthesis and fabrication of the supercapacitor cell with low‐cost metal sulfides and heterostructures should be developed to achieve the potential applications of these hybrid glorious materials. Herein, the significant and critical discussion of metal sulfides synthesis and their hybrid with carbon electrode structures for supercapacitor applications is disclosed. The realistic synthesis of metal sulfides, basic charge storage phenomena to elaborate the electrode nature, electrochemical properties including a single electrode, and asymmetric and symmetric cells are demonstrated for comparative purposes. The market values and application of supercapacitors are also elaborated. Herein, a better understanding to fresh readers about metal sulfide hybrid electrode structures for supercapacitors is provided.

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Sulfurization of Electrode Material: A Promising Window for Supercapacitor Technology

Khan,

Shakeel,

Alam

et al. 2023

Batteries & Supercaps

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Supercapacitors have emerged as a promising energy storage technology with attributes like high power and tuneable energy density along with splined cyclic potential. Their performance is heavily driven by the employed electrode materials that still crave high charge storage and rate capabilities as well as virile conductivity. Among numerous applied strategies to patch the corresponding quandary, sulfurization has garnered significant attention as an effective method for improving the electrochemical depiction of electrode materials. This review article presents a comprehensive analysis of the sulfurization process applied to the electrode with the aim of providing profound overview of the latest developments, the impact of sulfur incorporation on electrode properties, and the resulting performance enhancement in supercapacitors. It explores the influence of sulfidation on the morphological, structural, and compositional aspects of electrode materials, highlighting the modification of surface area, pore size distribution, crystal structure, and the formation of active sites. The discussions on the improved specific capacitance, enhanced rate capability, prolonged cycle life, and upgraded energy density achieved are accumulated. Additionally, the review explores the challenges and limitations associated with sulfurization and strategies to mitigate trials for future directions of research and developments.

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Low pressure sulfurization and characterization of multilayer MoS2 for potential applications in supercapacitors

Cited by 24 publications

References 24 publications

Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films

Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films

Design of Metals Sulfides with Carbon Materials for Supercapacitor Applications: A Review

Sulfurization of Electrode Material: A Promising Window for Supercapacitor Technology

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Low pressure sulfurization and characterization of multilayer MoS2 for potential applications in supercapacitors

Cited by 24 publications

References 24 publications

Impact of H 2 gas on the properties of MoS 2 thin films deposited by sulfurization of Mo thin films

Impact of H 2 gas on the properties of MoS 2 thin films deposited by sulfurization of Mo thin films

Design of Metals Sulfides with Carbon Materials for Supercapacitor Applications: A Review

Sulfurization of Electrode Material: A Promising Window for Supercapacitor Technology

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Product

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Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films

Impact of H ₂ gas on the properties of MoS ₂ thin films deposited by sulfurization of Mo thin films