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Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations

In this paper, we present an optical model that simulates the light trapping and scattering effects of a paraboloid texture surface first time. This model was experimentally verified by measuring the reflectance values of the periodically textured silicon (Si) surface with the shape of a paraboloid...

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Autores principales: Khan, Firoz, Baek, Seong-Ho, Kaur, Jasmeet, Fareed, Imran, Mobin, Abdul, Kim, Jae Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4586186/
https://www.ncbi.nlm.nih.gov/pubmed/26415541
http://dx.doi.org/10.1186/s11671-015-1087-9
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author Khan, Firoz
Baek, Seong-Ho
Kaur, Jasmeet
Fareed, Imran
Mobin, Abdul
Kim, Jae Hyun
author_facet Khan, Firoz
Baek, Seong-Ho
Kaur, Jasmeet
Fareed, Imran
Mobin, Abdul
Kim, Jae Hyun
author_sort Khan, Firoz
collection PubMed
description In this paper, we present an optical model that simulates the light trapping and scattering effects of a paraboloid texture surface first time. This model was experimentally verified by measuring the reflectance values of the periodically textured silicon (Si) surface with the shape of a paraboloid under different conditions. A paraboloid texture surface was obtained by electrochemical etching Si in the solution of hydrofluoric acid, dimethylsulfoxide (DMSO), and deionized (DI) water. The paraboloid texture surface has the advantage of giving a lower reflectance value than the hemispherical, random pyramidal, and regular pyramidal texture surfaces. In the case of parabola, the light can be concentrated in the direction of the Si surface compared to the hemispherical, random pyramidal, and regular pyramidal textured surfaces. Furthermore, in a paraboloid textured surface, there can be a maximum value of 4 or even more by anisotropic etching duration compared to the hemispherical or pyramidal textured surfaces which have a maximum h/D (depth and diameter of the texture) value of 0.5. The reflectance values were found to be strongly dependent on the h/D ratio of the texture surface. The measured reflectance values were well matched with the simulated ones. The minimum reflectance value of ~4 % was obtained at a wavelength of 600 nm for an h/D ratio of 3.75. The simulation results showed that the reflectance value for the h/D ratio can be reduced to ~0.5 % by reducing the separations among the textures. This periodic paraboloidal structure can be applied to the surface texturing technique by substituting with a conventional pyramid textured surface or moth-eye antireflection coating.
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spelling pubmed-45861862015-10-02 Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations Khan, Firoz Baek, Seong-Ho Kaur, Jasmeet Fareed, Imran Mobin, Abdul Kim, Jae Hyun Nanoscale Res Lett Nano Express In this paper, we present an optical model that simulates the light trapping and scattering effects of a paraboloid texture surface first time. This model was experimentally verified by measuring the reflectance values of the periodically textured silicon (Si) surface with the shape of a paraboloid under different conditions. A paraboloid texture surface was obtained by electrochemical etching Si in the solution of hydrofluoric acid, dimethylsulfoxide (DMSO), and deionized (DI) water. The paraboloid texture surface has the advantage of giving a lower reflectance value than the hemispherical, random pyramidal, and regular pyramidal texture surfaces. In the case of parabola, the light can be concentrated in the direction of the Si surface compared to the hemispherical, random pyramidal, and regular pyramidal textured surfaces. Furthermore, in a paraboloid textured surface, there can be a maximum value of 4 or even more by anisotropic etching duration compared to the hemispherical or pyramidal textured surfaces which have a maximum h/D (depth and diameter of the texture) value of 0.5. The reflectance values were found to be strongly dependent on the h/D ratio of the texture surface. The measured reflectance values were well matched with the simulated ones. The minimum reflectance value of ~4 % was obtained at a wavelength of 600 nm for an h/D ratio of 3.75. The simulation results showed that the reflectance value for the h/D ratio can be reduced to ~0.5 % by reducing the separations among the textures. This periodic paraboloidal structure can be applied to the surface texturing technique by substituting with a conventional pyramid textured surface or moth-eye antireflection coating. Springer US 2015-09-29 /pmc/articles/PMC4586186/ /pubmed/26415541 http://dx.doi.org/10.1186/s11671-015-1087-9 Text en © Khan et al. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Khan, Firoz
Baek, Seong-Ho
Kaur, Jasmeet
Fareed, Imran
Mobin, Abdul
Kim, Jae Hyun
Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title_full Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title_fullStr Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title_full_unstemmed Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title_short Paraboloid Structured Silicon Surface for Enhanced Light Absorption: Experimental and Simulative Investigations
title_sort paraboloid structured silicon surface for enhanced light absorption: experimental and simulative investigations
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4586186/
https://www.ncbi.nlm.nih.gov/pubmed/26415541
http://dx.doi.org/10.1186/s11671-015-1087-9
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