Bimetallic Core-Shell with Graphene Coating Nanoparticles: Enhanced Optical Properties and Slow Light Propagation

Naseri, Tayebeh; Pourkhavari, Fatemeh

doi:10.1007/s11468-019-01101-w

Cited by 12 publications

(7 citation statements)

References 31 publications

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“…This results in a stronger electric field on the surface [ 27 ] and a variation in the oscillation frequency of free carriers. [ 28 ] According to Figure 2f, g ( λ ) is not constant along the entire solar spectrum because of LSPR. Moreover, g ( λ ) quenches at a shorter wavelength from 300 nm to ≈700 nm.…”

Section: Resultsmentioning

confidence: 99%

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Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells

Abdolhay

Kashaninia

Banihashemi

2023

Physica Status Solidi (b)

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An up to 25% power conversion efficiency and performance improvement of perovskite solar cells (PSCs) have made them promising products in photovoltaic technology. This study numerically investigates the light trapping and broadband light absorption enhancement of a PSC by introducing bismuth selenide (Bi2Se3) as shell material for Cu nanospheres (NSs) to achieve a “core/shell” configuration (Cu/Bi2Se3NSs) in the absorber layer of the PSC. The optimal values of Cu NS radius, Bi2Se3 thickness, periodicity of NSs, and the thickness of the absorber layer of PSC are equal to 40, 35, 172.5, and 410 nm, respectively. This structure has a photocurrent density (JL) of 33.01 mA cm−2 and a maximum normalized absorbed power () of 0.89 compared to the bare PSC with = 21.8 mA cm−2 and = 0.87. The results indicate that the increase in the Bi2Se3 thickness up to 35 nm at a fixed Cu NS radius of 40 nm can enhance the absorption in the whole spectrum. However, this enhancement is greater at longer wavelengths. The extinction cross‐section is improved by about 3.5 times in comparison with the bare Cu NSs. The results for the PSC with Cu/Bi2Se3 NSs show a 51.3% absorption enhancement compared to the PSC without NSs.

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Section: Resultsmentioning

confidence: 99%

“…The resonance wavelength and the extinction cross‐section peak change with increasing shell thickness due to metallic core/shell interaction. [ 28 ] This feature can be used to extend the light absorption range of solar cells to longer wavelengths.…”

Section: Resultsmentioning

confidence: 99%

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells

Abdolhay

Kashaninia

Banihashemi

2023

Physica Status Solidi (b)

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“…where ∞ is the phenomenological parameter describing the contribution of bound electrons to polarizability, is the bulk plasmon frequency, 0 is the damping constant of the bulk material, for Ag, ∞ = 4.5 , 0 = 0.072 = and = 9.02 [12,19] and Au, ∞ = 9.84 , 0 = 0.011 = and = 9.62 [5,21].…”

Section: Methodsmentioning

confidence: 99%

“…Two layer of bimetallic core-shell nano-structure (CSNS) is studied for the desire applications either experimentally [9][10][11] and theoretically [12,13]. Due to their peculiar properties and possible applications in catalysis, electronics, optoelectronics, information storage, bio-sensors, optical sensor, and surface enhanced Raman spectroscopy, bimetallic core-shell nanostructures have attracted tremendous attention.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Properties of Bimetallic Quantum Dot Ag@Au Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium

Gbb¹

2021

Preprint

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This studies the plasmonic properties of the bimetallic quantum dot Ag@Au core-shell nanostructures embedded in the non-absorbent host medium. Local field enhancement factor and coefficient of absorption of Ag-core and Au-shell are primarily studied based on quasi-static approximation of classical electrodynamics for 6-10 nm composite radius. In this quantum dot geometry, two set of plasmonic resonances in visible spectral region are observed: the first resonance associated with inner interface of gold (Ag@Au) and the second resonance associated with outer interface of gold (Au@medium). The two plasmonic resonances are close each other and enhanced when the size of composite decreased for a fixed core size while shifted to in opposite direction and the amplitude of peak decreased when the core size is increased for a fixed composite size. For the optimized size of core/composite or shell thickness and other parameters to the desired values, such type of composites are recommended for various applications like; photocatalysis, biomedical, nano-optoelectronics.

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“…Once the graphene layer was successfully fabricated, some researchers became interested in studying the effect of the graphene layer on NPs to generate absorption and scattering peaks. A previous study has shown that adding a graphene layer to bimetallic nanoparticles causes increasing plasmonic modes and red-shift phenomena [13]. In 2019, a study on photothermal therapy by graphene-coated gold NPs was conducted [14].…”

Section: Introductionmentioning

confidence: 99%

Solar Irradiance Absorption Performance of a Spherical Multilayered Nanoparticle Coated with Graphene

Fitriyadi

Azwar

Noor

2023

e-J. Surf. Sci. Nanotechnol.

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Absorption efficiency and performances of nanoparticles (NPs) for solar irradiance harvesting were investigated using quasi-static approximation of electrodynamics. This work considered gold (Au)-and silver (Ag)-based NPs in five configurations: solid, metal-graphene (MG), dielectric-metal (DM), dielectric-metal-graphene (DMG), and dielectric-graphenemetal (DGM). SiO 2 and HfO 2 were the dielectric materials of the structure or the host medium. The size-dependent Drude-Lorentz model determines the permittivity of the metal and the Kubo formula determines the surface conductivity of the graphene. The calculated results show that DGM NPs have the highest absorption performance compared to others with the same radius of 15.34 nm (including a 0.34 nm graphene layer). A SiO 2graphene-metal NP in HfO 2 gave the best performance when the dielectric material and environment in the structure were exchanged. Furthermore, adding a graphene layer to an NP generates a secondary peak at a low frequency but reduces the primary peak. Additionally, the performance was enhanced by varying the core radius from 5 to 20 nm for a fixed-size DGM NP with a radius of 25.34 nm until it declines after reaching the maximum performance point. Also, the thickness of graphene influenced the performance of this structure. As a result, a DMG NP can be chosen to be applied in solar irradiance harvesting devices because this structure enhances the solar irradiance absorption performance.

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Bimetallic Core-Shell with Graphene Coating Nanoparticles: Enhanced Optical Properties and Slow Light Propagation

Cited by 12 publications

References 31 publications

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells

Plasmonic Properties of Bimetallic Quantum Dot Ag@Au Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium

Solar Irradiance Absorption Performance of a Spherical Multilayered Nanoparticle Coated with Graphene

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Bimetallic Core-Shell with Graphene Coating Nanoparticles: Enhanced Optical Properties and Slow Light Propagation

Cited by 12 publications

References 31 publications

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi2Se3 on Optical Properties of Perovskite Solar Cells

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi2Se3 on Optical Properties of Perovskite Solar Cells

Plasmonic Properties of Bimetallic Quantum Dot Ag@Au Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium

Solar Irradiance Absorption Performance of a Spherical Multilayered Nanoparticle Coated with Graphene

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Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells

Effect of a Metal–Semiconductor Hetero Nanostructure of Cu/Bi₂Se₃ on Optical Properties of Perovskite Solar Cells