Large optical gain from the 2D-transition metal dichalcogenides of MoS2/WSe2 quantum wells

Ridene, Saïd

doi:10.1016/j.spmi.2017.12.060

Cited by 20 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Youzi Zhang et al have prepared the MoS 2 with 242% enhancement in production of H 2 gas [27]. Said Ridene has investigated improving results by fabricating MoS 2 and employing in laser emitting gadgets [28]. Adhimoorthy Saravanan et al have composed the MoS 2 nanomaterials for future gas sensor and storage employments [29].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Khan

Hasan

Bhatti

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Transition metal dichalcogenides (TMDs) are promising materials for photocatalytic functions. In class of TMDs, MoS 2 is comprehensively explored as a co-catalyst due to the extraordinary activity for photocatalytic activity of organic dye degradation. But the catalytic activities of MoS 2 are generated through S ions on depiction edges. Also numerous of S ions existed on basal planes are catalytically inactive. The insertion of external metals in MoS 2 organism is extensive way for activation of basal planes surface to enhance concentration of catalytically active sites. For this purpose, nanoparticles of Nickel (Ni) doped MoS 2 are prepared by hydrothermal technique. Structural and morphological analysis are characterized by XRD and SEM, respectively. XRD results showed that Ni is completely doped into MoS 2 . SEM showed that pure MoS 2 has sheet like structure and Ni doped MoS 2 has mix disc and flower like structure. Band gap energy was observed in declining range of 2.30-1.76 eV. The photocatalytic activity of pure MoS 2 and Ni doped MoS 2 were evaluated by degrading MB and RhB dyes under UV light irradiation. MB dye degradation of MB was 71% for pure MoS 2 . For 1% to 5% Ni doping in MoS 2 , MB dye degradated from 85% to 96%. It means that MB dye degradation of MB was enhanced continuously by increasing the concentration of Ni doping. RhB dye degradation of RhB was 62% for pure MoS 2 . For 1% to 5% Ni doping in MoS 2 , the RhB dye degradated from 77% to 91%.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Khan

Hasan

Bhatti

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Before the study of the A-and B-exciton dispersion in Ni-MoS 2 nanosheets it is essential to estimate the variation of extrema of conduction (CB) and valence (VB) bands edges at the (K, K ′ ) points of the Brillouin zone. The wave vector CB |Y ñand VB |Y ñ  of the C 3h group and the k.p Hamiltonian with and without spin-orbit interaction have been described for the first time in references [32,33]:…”

Section: Dispersion Relation In Ni-mos 2 Nanosheetsmentioning

confidence: 99%

Linear and nonlinear exciton polariton dispersion in MoS₂ nanosheets and its nickel doping dependence

Kaddour,

Mastour,

Zaimia

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

In this paper, we study the influence of Ni-doping on A- and B-exciton polariton dispersion in MoS2 nanosheets. In particular, we have calculated the effect of the Ni-concentration on the energy dispersion and therefore we have deduced the effective masses by adjusting the hopping parameter. The EA, EB-exciton transition energies and the hopping parameter are discerned from the PL of Ni-MoS2 nanosheets. It is shown that the Ni changes considerably the bandgap and as a result the electronic band structure, the effective masses, the optical transition, and the hopping term. We found that the increasing concentration of Ni-dopant can modulate and favors the mixture of A- and B-exciton peaks of MoS2 nanosheets. The diverging Ni-concentration of A- and B-exciton polariton dispersion are also discerned and discussed. Finaly, we can predict that these changes caused by the influence of Ni-doping can be used in most applications involving exciton polariton dispersion for photonics and optoelectronics devices.

show abstract

“…Therefore, the band-offset permits the creation of the potential well and the confinement of the particles. The MoS 2 /TMX 2 heterostructures were discussed and investigated in the literature [5,8,9,14,27]. It was demonstrated that MoS 2 /WSe 2 heterostructure has the largest band-offset from all the other MoS 2 /TMX 2 materials.…”

Section: Effect Of Exchange-correlation Potential On the Ground State...mentioning

confidence: 99%

“…One of the particularities of MoS 2 and WSe 2 from other materials is the possibility to re-stack these two semiconductors in the vertical growth direction to produce van der Waals nanostructures without the necessity of lattice matching [5][6][7]. Furthermore, at high carrier densities, the electron and hole energies in MoS 2 /WSe 2 van der Waals nanostructure are renormalised due to many-body effects [8][9][10][11][12]. Indeed, a detailed knowledge of the dependence of the resulting total energy on carrier density is of great importance for the understanding and modelling of MoS 2 /WSe 2 van der Waals nanostructure.…”

Section: Introductionmentioning

confidence: 99%

Coupling and interface effects in MoS₂/WSe₂ van der Waals nanostructure

Mastour,

Jemaï,

Ridene

2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

In this work we report the effects of the interface coupling, the effective mass, the Hartree and exchange–correlation potential on the total energy in quasi-2D MoS2/WSe2 van der Waals nanostructure. Analytical and numerical solutions of the total energy as a function of carrier density and effective mass are determined without self-consistent calculation. The calculation carefully indicates how the quasi-2D electron gas arises from the interface coupling between MoS2 and WSe2 layers. Moreover, the results showed that the width of the wave function and the length scale between the two materials’ interface decrease with increasing electron density while the corresponding ground state quantisation energy in the z-direction increases considerably. Furthermore, in MoS2 layer with density n s = 4 × 1012 cm−2 this additional separation is approximately 2 nm and 〈z〉 = 1 nm. Due to the disparity in effective mass of electrons and holes in MoS2, the majority of the excess energy is absorbed as kinetic energy by electrons. The comparison with available experimental and DFT calculation indicates that the present work reproduces properly known results for MoS2/WSe2 interface.

show abstract

Large optical gain from the 2D-transition metal dichalcogenides of MoS2/WSe2 quantum wells

Cited by 20 publications

References 25 publications

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Linear and nonlinear exciton polariton dispersion in MoS₂ nanosheets and its nickel doping dependence

Coupling and interface effects in MoS₂/WSe₂ van der Waals nanostructure

Contact Info

Product

Resources

About

Large optical gain from the 2D-transition metal dichalcogenides of MoS2/WSe2 quantum wells

Cited by 20 publications

References 25 publications

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS2, prepared by Hydrothermal method

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS2, prepared by Hydrothermal method

Linear and nonlinear exciton polariton dispersion in MoS2 nanosheets and its nickel doping dependence

Coupling and interface effects in MoS2/WSe2 van der Waals nanostructure

Contact Info

Product

Resources

About

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Effect of Ni doping on the structural, optical and photocatalytic activity of MoS₂, prepared by Hydrothermal method

Linear and nonlinear exciton polariton dispersion in MoS₂ nanosheets and its nickel doping dependence

Coupling and interface effects in MoS₂/WSe₂ van der Waals nanostructure