Preparation, modification and nonlinear optical properties of semiconducting MoS2 and MoS2/ZnO composite film

Liu, Haiquan; Yao, Cheng‐Bao; Jiang, Cai-Hong; Wang, Xue

doi:10.1016/j.optlastec.2020.106905

Cited by 19 publications

(7 citation statements)

References 98 publications

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“…In the case of MoS 2 , the excited electron transitioned from VB to CB by several interband and intraband transitions (Figure b), such as VB (S 00 ) state to CB (S 01 ) state by one-photon absorption (1PA), VB (S 00 ) state to CB (S 02 ) state by TPA, and CB (S 02 ) state to CB (S 03 ) state by 1PA . The excited carriers transfer from CB (S 03 ) states in MoS 2 to the bottom of the CB of ZnO during the interfacial charge-transfer process . These phenomena cause SA in the heterostructure.…”

Section: Results and Discussionmentioning

confidence: 99%

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Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Paul,

Karthikeyan

2024

ACS Appl. Opt. Mater.

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Engineering the dynamics of excitons, including charge generation, diffusion, and recombination in semiconductor−polymer nanocomposites, provides a powerful platform for fundamental and applied interests in linear and nonlinear optics. In this work, we have reported the modulation and generation of multiple excitons in ternary composite consisting of core−shell ZnO@MoS 2 heterostructures and fibrous polyaniline (PANI). The investigation of nonlinear optical properties of MoS 2 -based nanocomposite films shows that pure MoS 2 thin films show typical saturable absorption (SA) behavior while a crossover from SA to reverse saturable absorption (RSA) occurs for ZnO@MoS 2 binary composites. Interestingly, after the addition of conducting polymer PANI, the ternary composite thin films again exhibit an SA response. Particularly, the Pauli blocking effect induces SA in MoS 2 , whereas the nonlinear response in the ternary composites can be attributed to the hybridization of multiple excitons. Therefore, our findings, which reveal the role of engineered excitonic behavior, can offer several opportunities for multifunctional photonic devices.

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Section: Results and Discussionmentioning

confidence: 99%

“…10 The excited carriers transfer from CB (S 03 ) states in MoS 2 to the bottom of the CB of ZnO during the interfacial charge-transfer process. 46 These phenomena cause SA in the heterostructure. Further, the input pulse energy was raised to 35 μJ.…”

Section: Nonlinear Optical Studies and Mechanismmentioning

confidence: 99%

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Paul,

Karthikeyan

2024

ACS Appl. Opt. Mater.

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“…The growth mode of MoS 2 with I-type (c ∥ ) and II-type (c ⊥ ) on MoTe 2 corresponds to the c -axis parallel and perpendicular to the substrate plane, respectively. In refs and , the growth mode of MoS 2 by the magnetron sputtering method has been reported and is summarized in Figure S2. With the change of sputtering temperature and time, the final growth mode of MoS 2 is I-type stacked II-type.…”

Section: Resultsmentioning

confidence: 99%

Visualizing Orientation Controlled Interface and Interlayer Electron/Exciton–Phonon Coupling in the MoS₂/MoTe₂ Nanoheterostructure for Photoelectric Conversion

Li,

Shi,

Cao

et al. 2023

ACS Appl. Nano Mater.

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Semiconducting 2D layered transition metal dichalcogenides (TMDs) and TMD heterostructures have attracted much attention in porous materials because of their unique electrical and optical properties. However, the role of controlled epitaxial growth and strain in the interfacial electron transfer and nonlinear optical (NLO) conversion efficiency of the TMD/ TMD nanoheterostructure remains poorly understood. Herein, we have successfully synthesized a MoS 2 /MoTe 2 nanoheterostructure with excellent photoelectric and NLO properties. The designed MoS 2 /MoTe 2 nanoheterostructure exhibits excellent NLO performance, including a high nonlinear absorption (NLA) coefficient of 10 −7 cm/W at the pulse energy of 5 μJ, which is attributed to the enhanced light absorption capacity of MoTe 2 and the modulation of interlayer carrier diffusion. Based on the synergistic effects of optimization strain and interface engineering, an in-depth analysis was conducted on the effects of surface modification on the photoelectrochemical (PEC) performance optimization of the MoS 2 /MoTe 2 nanoheterostructure. The synergistic effect of strain and the interface can promote the continuous transfer of electrons between MoTe 2 and MoS 2 . This work studied the visualization control interface and interlayer electron/exciton phonon coupling in van der Waals MoS 2 /MoTe 2 , providing some inspiration for achieving good NLO conversion efficiency and efficient PEC anode materials.

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“…As a result, they can provide a solid interface with the incident photon and have advantageous properties like broadband absorption, transparency, and high carrier mobility. The interest in 2D TMDs, particularly MoS 2 monolayers, resulted in a variety of applications [ 6 , 7 , 8 , 9 , 10 , 11 ]. The bandgap of TMDs depends on the number of layers and the type of dopants.…”

Section: Introductionmentioning

confidence: 99%

High-Order Harmonics Generation in MoS2 Transition Metal Dichalcogenides: Effect of Nickel and Carbon Nanotube Dopants

Venkatesh

Kim

Boltaev

et al. 2023

IJMS

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The transition metal dichalcogenides have instigated a lot of interest as harmonic generators due to their exceptional nonlinear optical properties. Here, the molybdenum disulfide (MoS2) molecular structures with dopants being in a plasma state are used to demonstrate the generation of intense high-order harmonics. The MoS2 nanoflakes and nickel-doped MoS2 nanoflakes produced stronger harmonics with higher cut-offs compared with Mo bulk and MoS2 bulk. Conversely, the MoS2 with nickel nanoparticles and carbon nanotubes (MoS2-NiCNT) produced weaker coherent XUV emissions than other materials, which is attributed to the influence of phase mismatch. The influence of heating and driving pulse intensities on the harmonic yield and cut-off energies are investigated in MoS2 molecular structures. The enhanced coherent extreme ultraviolet emission at ~32 nm (38 eV) due to the 4p-4d resonant transitions is obtained from all aforementioned molecular structures, except for MoS2-NiCNT.

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Preparation, modification and nonlinear optical properties of semiconducting MoS2 and MoS2/ZnO composite film

Cited by 19 publications

References 98 publications

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Visualizing Orientation Controlled Interface and Interlayer Electron/Exciton–Phonon Coupling in the MoS₂/MoTe₂ Nanoheterostructure for Photoelectric Conversion

High-Order Harmonics Generation in MoS2 Transition Metal Dichalcogenides: Effect of Nickel and Carbon Nanotube Dopants

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Preparation, modification and nonlinear optical properties of semiconducting MoS2 and MoS2/ZnO composite film

Cited by 19 publications

References 98 publications

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS2/Polyaniline Nanocomposite Films

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS2/Polyaniline Nanocomposite Films

Visualizing Orientation Controlled Interface and Interlayer Electron/Exciton–Phonon Coupling in the MoS2/MoTe2 Nanoheterostructure for Photoelectric Conversion

High-Order Harmonics Generation in MoS2 Transition Metal Dichalcogenides: Effect of Nickel and Carbon Nanotube Dopants

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Product

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Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Modification of the Exciton Lifetime and Saturable Absorption Behavior of ZnO@MoS₂/Polyaniline Nanocomposite Films

Visualizing Orientation Controlled Interface and Interlayer Electron/Exciton–Phonon Coupling in the MoS₂/MoTe₂ Nanoheterostructure for Photoelectric Conversion