Enhanced emission from Si-based light-emitting diodes using surface plasmons

Pillai, Supriya; Catchpole, Kylie; Trupke, Thorsten; Zhang, G.; Zhao, Jianhua; Green, Martin A.

doi:10.1063/1.2195695

Cited by 257 publications

(197 citation statements)

References 11 publications

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“…The pronounced cross-over in the vicinity of 10 nm (for Au, Ag and Cu) has been predicted [16]-for smaller nanospheres, the scattering damping (including boundaries and so-called Landau damping [18]) is important, while for larger spheres, the radiation losses are overwhelming. It is thus clear that rather large nanoparticles would play a role in all the phenomena linked with possible energy and information transport employing plasmon radiation, which well corresponds to experimental observations [4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 52%

“…The strengthening of the probability transition due to all indirect interband paths of excitations in the semiconductor is probably responsible for the observed experimentally strong enhancement of light absorption and emission in diode systems mediated by surface plasmons in nanoparticle surface coverings [4,5,6,7,8,9].…”

Section: Vmentioning

confidence: 99%

“…Experimental observations [4,5,6,7,8,9] suggest, that the short range coupling between plasmons in nanospheres and electrons in the semiconductor substrate allows for significant growth of selective light energy transformation into a photo-current in the diode system. This phenomenon is not described in detail as of yet and moreover, some competitive mechanisms apparently contribute.…”

Section: Introductionmentioning

confidence: 99%

“…Of particular interest are the recently reported experimental data on giant enhancement of photoluminescence and absorption of light by semiconductor surfaces (of photo-diodes) covered with metallic (gold, silver, or copper) nanospheres, with sphere radii of the order of several to several tens of nanometres [4,5,6,7,8,9]. These phenomena are recognized as promising for the enhancement of the efficiency of solar cells by the application of special metallic nanoparticle coverings of photo-active layers [4,5]. Metallic nanospheres (or nanoparticles of other shape) can act as light converters, collecting energy of incident photons in surface plasmon oscillations.…”

Section: Introductionmentioning

confidence: 99%

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Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Jacak¹,

Krasnyj²,

Jacak³

et al. 2011

J. Phys. D: Appl. Phys.

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Abstract.Metallic nanospheres (Au, Ag, Cu) deposited on PV-active semiconductor surface can act as light converters, collecting energy of incident photons in plasmon oscillations. This energy can be next transferred to semiconductor substrate via a near-field channel, in a more efficient manner in comparison to the direct photo-effect. We explain this enhancement by inclusion of indirect inter-band transitions in semiconductor layer due to the near-field coupling with plasmon radiation in nanoscale of the metallic components, where the momentum is not conserved as the system is not translationally invariant. The model of the nano-sphere plasmons is developed (RPA, analytical version, adjusted to description of large metallic clusters, with radius of 10 − 60 nm) including surface and volume modes. Damping of plasmons is analyzed via Lorentz friction, and irradiation losses in far-and near-field regimes. Resulting resonance shifts are verified experimentally for Au and Ag colloidal water solutions with respect to particle size. Probability of the electron interband transition (within the Fermi golden rule) in substrate semiconductor induced by coupling to plasmons in near-field regime turns out to be significantly larger than for coupling of electrons to planarwave photons. This is of practical importance for enhancement of thin-film solar cell efficiency, both for semiconductor type (like III-V semiconductor based cells) and for Confidential: not for distribution. Submitted to IOP Publishing for peer review 7 November 2010Mechanism of plasmon-mediated enhancement of PV efficiency 2 conjugate-polymer-based or dye organic plastic cells, intensively developed at present. We have described also a non-dissipative collective mode of surface plasmons in a chain of near-field-coupled metallic nanospheres, for particular size, separation parameters and wave-lengths. This would find an application in sub-diffraction electro-photonic circuit arrangement and for possible energy transport in solar cells, in particular in organic materials with low mobility of carriers.

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Section: Introductionmentioning

confidence: 52%

Section: Vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Jacak¹,

Krasnyj²,

Jacak³

et al. 2011

J. Phys. D: Appl. Phys.

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“…1 Among noble metals, Au and Ag are two kinds of commonly used NP materials that exhibit strong localized surface plasmon resonances (LSPRs) from the ultraviolet to near-infrared bands, where the LSPR of these particles gives rise to strong optical scattering and near-field enhancement around the particle. In recent years, metal NPs have been investigated as a light trapping scheme to increase the optical absorption in optoelectronic devices [2][3][4][5][6][7] such as solar cells.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of Ag-dielectric core-shell nanostructures for silicon solar cells

et al. 2015

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Metal-dielectric core-shell nanostructures have been proposed as a light trapping scheme for enhancing the optical absorption of silicon solar cells. As a potential application of such enhanced effects, the scattering efficiencies of three core-shell structures (Ag@SiO2, Ag@TiO2, and Ag@ZrO2) are discussed using the Mie Scattering theory. For compatibility with experiment results, the core diameter and shell thickness are limited to 100 and 30 nm, respectively, and a weighted scattering efficiency is introduced to evaluate the scattering abilities of different nanoparticles under the solar spectrum AM 1.5. The simulated results indicate that the shell material and thickness are two key parameters affecting the weighted scattering efficiency. The SiO2 is found to be an unsuitable shell medium because of its low refractive index. However, using the high refractive index mediumTiO2 in Ag@TiO2 nanoparticles, only the thicker shell (30 nm) is more beneficial for light scattering. The ZrO2 is an intermediate refractive index material, so Ag@ZrO2 nanoparticles are the most effective core-shell nanostructures in these silicon solar cells applications.

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