MoS2 induced the enhancement of nonlinear absorption of Ag thin film

Li, Zhengwang; Hong, Richang; Liu, Qingyou; Liao, Jing; Cheng, Qianbing; Wang, Qi; Tao, Chunxian; Lin, Hui; Zhang, Dawei

doi:10.1016/j.physb.2020.412261

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…In Model 2, the Z -scan curves were also fitted with the following model used in various metal studies in the literature: 11,12,26,27 where T ( z ) is the transmittance of the sample, I 0 is the intensity at the focal point, and z is the position of the sample on the translation axis. z 0 is the Rayleigh length and is equal to , where w 0 is the beam waist and λ is the wavelength.…”

Section: Resultsmentioning

confidence: 99%

“…Model 1 is a model proposed by our group that gives the effective nonlinear absorption coefficient values to include the OPA, ESA, TPA and SA mechanisms. Model 2, on the other hand, is a widely used model in the literature 11,12,[25][26][27] in which the contributions of OPA and TPA are taken into account. However, it neglects ESA, which is very important in the calculations related to samples with high free carrier density.…”

Section: Nonlinear Absorption Propertiesmentioning

confidence: 99%

“…8. In Model 2, the Z-scan curves were also fitted with the following model used in various metal studies in the literature: 11,12,26,27 TðzÞ ¼…”

Section: Nanoscale Papermentioning

confidence: 99%

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Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

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Akkoyun,

Karatay

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Section: Nonlinear Absorption Propertiesmentioning

confidence: 99%

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Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

Ünlü,

Akkoyun,

Karatay

et al. 2023

Nanoscale

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“…This characteristic enables them to have a broad spectrum of NLO applications, such as optical modulators and optical switches. − Therefore, the NLO properties of semiconductors can be improved by decorating them with metal. Li et al prepared Ag/MoS 2 composite films and investigated their nonlinear-absorption (NLA) properties. They discovered that MoS 2 can enhance the saturation absorption (SA) of Ag films, attributed to the SPR near a 1550 nm excitation wavelength.…”

Section: Introductionmentioning

confidence: 99%

Photogenerated Carrier Separation and Localized Surface Plasmon Resonance in MoS₂/Metal Nanocomposites: Implications for Photoelectric Devices

Shi,

Li,

Cao

et al. 2024

ACS Appl. Nano Mater.

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Integrating noble metals with semiconductors is a viable approach to enhancing the photoelectric conversion efficiency of samples. The combination of metals with semiconductors has found widespread application in the field of optoelectronics and devices. Herein, metal (M = Ag/Cu) and MoS 2 (MoS 2 /M) nanocomposites were successfully synthesized using magnetron sputtering and hydrothermal two-step methods. The sizes and morphologies of the metals can be adjusted by controlling the sputtering time. Metals Ag and Cu were anchored onto defective MoS 2 nanomaterials, serving as photoanodes and light absorbers, respectively. The vacancy-induced defect structure, along with the synergistic effect of the interface and size, can simultaneously regulate the charge-carrier dynamics and the band structure of MoS 2 /M nanocomposites. The transient photocurrent responses and the electrochemical impedance spectroscopy results demonstrate the excellent photoelectrochemical (PEC) properties of the MoS 2 /M nanocomposites. A finite-difference timedomain simulation reveals that the strong plasmonic electromagnetic field generated by metal can significantly enhance the energyband transition rate of neighboring materials and improve photogenerated carrier separation. Compared with pure MoS 2 , MoS 2 /M nanocomposites exhibit enhanced nonlinear-optical (NLO) behavior. This improvement stems from an effective charge separation, which is facilitated by a synergistic interaction between the electric field and the plasmonic magnetic field. Density functional theory calculations indicate a decrease in the energy of the Mo d orbital, which contributes to the acceptance of d electrons from Ag/Cu. The exceptional performance of MoS 2 /M nanocomposites is primarily attributed to the occupancy of Mo d orbitals, driven by the intense interaction among MoS 2 and Ag/Cu optimal combination. This work offers valuable insights into the design of heterojunctions with abundant surface/interface contact and defect features to enhance tunable electron-transfer kinetics. Such advancements pave the way for achieving a high NLO conversion efficiency and the development of efficient PEC anode materials.

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“…Precious metals exhibit a peculiar surface plasmon resonance effect (SPRE) that has a considerable impact on the band gap, photon absorption, and photon emission of semiconductor materials. The SPRE of precious metals allows them to absorb visible light and generate strong inhomogeneous electric fields on the nearby semiconductor surface. − Plasmonic energy can be used as extra energy to inhibit charge recombination and generate a plasmon heating zone to facilitate PEC conversion. − By combining semiconductors with different noble metals − such as Au, Ag, Cu, and Pt, noble metal–MoS 2 nanostructures have been synthesized, thus considerably improving the PEC activity of MoS 2 . Sun et al reported a strategy to efficiently enhance and broaden the photoresponse of MoS 2 hybrid devices using a Au nanoslit array architecture.…”

Section: Introductionmentioning

confidence: 99%

Engineering the Interface of Cu/MoS₂ Nanostructures for Improved Charge Transfer for Applications as PEC Anode Materials

Shi

Yao

et al. 2023

ACS Appl. Nano Mater.

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Electronic structures of metal and semiconductor composites play a crucial role in photoelectric conversion. To obtain a fast-response photoelectrochemical (PEC) anode, its orbital regulation is a challenge. Herein, the occupancy state of the d orbitals of Mo is adjusted to achieve high-efficiency photoelectric conversion by adjusting the quantity of Cu by magnetron sputtering deposited in Cu/MoS2 composites. Characterization results indicate that the SEM morphology of MoS2 changes distinctly. Meanwhile, the (111) and (200) diffraction peaks and 0 and 2+ valence states of Cu appeared in XRD and XPS, respectively, confirming the successful synthesis of Cu/MoS2. The prior band shift at the heterojunction causes efficient separation of photogenerated charge carriers and the shift of the position of Mo 3d to higher binding energies, which results in weaker intrinsic luminescence at 810 nm in the PL spectrum and smaller charge transfer resistance in the electrochemical impedance spectroscopy spectra, confirming the high PEC performance of the Cu/MoS2 composites. Meanwhile, the density functional theory calculations reveal that the energy of the d orbital of Mo in MoS2 decreases, which is helpful to accept electrons in Cu 3d. The Mo d track-occupancy introduced through the strong interplay between the most desirable combination of MoS2 and Cu will be accountable for such record-high performance. Therefore, this study makes a strong case for fine-tuning the electronic structures of PEC anode materials.

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MoS2 induced the enhancement of nonlinear absorption of Ag thin film

Cited by 7 publications

References 32 publications

Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

Photogenerated Carrier Separation and Localized Surface Plasmon Resonance in MoS₂/Metal Nanocomposites: Implications for Photoelectric Devices

Engineering the Interface of Cu/MoS₂ Nanostructures for Improved Charge Transfer for Applications as PEC Anode Materials

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MoS2 induced the enhancement of nonlinear absorption of Ag thin film

Cited by 7 publications

References 32 publications

Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

Controlled plasmon-induced nonlinear absorption and optical limiting in Al/PVP composite nanofibers

Photogenerated Carrier Separation and Localized Surface Plasmon Resonance in MoS2/Metal Nanocomposites: Implications for Photoelectric Devices

Engineering the Interface of Cu/MoS2 Nanostructures for Improved Charge Transfer for Applications as PEC Anode Materials

Contact Info

Product

Resources

About

Photogenerated Carrier Separation and Localized Surface Plasmon Resonance in MoS₂/Metal Nanocomposites: Implications for Photoelectric Devices

Engineering the Interface of Cu/MoS₂ Nanostructures for Improved Charge Transfer for Applications as PEC Anode Materials