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High efficiency silicon solar cell based on asymmetric nanowire

Improving the efficiency of solar cells through novel materials and devices is critical to realize the full potential of solar energy to meet the growing worldwide energy demands. We present here a highly efficient radial p-n junction silicon solar cell using an asymmetric nanowire structure with a...

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Autores principales: Ko, Myung-Dong, Rim, Taiuk, Kim, Kihyun, Meyyappan, M., Baek, Chang-Ki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4495391/
https://www.ncbi.nlm.nih.gov/pubmed/26152914
http://dx.doi.org/10.1038/srep11646
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author Ko, Myung-Dong
Rim, Taiuk
Kim, Kihyun
Meyyappan, M.
Baek, Chang-Ki
author_facet Ko, Myung-Dong
Rim, Taiuk
Kim, Kihyun
Meyyappan, M.
Baek, Chang-Ki
author_sort Ko, Myung-Dong
collection PubMed
description Improving the efficiency of solar cells through novel materials and devices is critical to realize the full potential of solar energy to meet the growing worldwide energy demands. We present here a highly efficient radial p-n junction silicon solar cell using an asymmetric nanowire structure with a shorter bottom core diameter than at the top. A maximum short circuit current density of 27.5 mA/cm(2) and an efficiency of 7.53% were realized without anti-reflection coating. Changing the silicon nanowire (SiNW) structure from conventional symmetric to asymmetric nature improves the efficiency due to increased short circuit current density. From numerical simulation and measurement of the optical characteristics, the total reflection on the sidewalls is seen to increase the light trapping path and charge carrier generation in the radial junction of the asymmetric SiNW, yielding high external quantum efficiency and short circuit current density. The proposed asymmetric structure has great potential to effectively improve the efficiency of the SiNW solar cells.
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spelling pubmed-44953912015-07-13 High efficiency silicon solar cell based on asymmetric nanowire Ko, Myung-Dong Rim, Taiuk Kim, Kihyun Meyyappan, M. Baek, Chang-Ki Sci Rep Article Improving the efficiency of solar cells through novel materials and devices is critical to realize the full potential of solar energy to meet the growing worldwide energy demands. We present here a highly efficient radial p-n junction silicon solar cell using an asymmetric nanowire structure with a shorter bottom core diameter than at the top. A maximum short circuit current density of 27.5 mA/cm(2) and an efficiency of 7.53% were realized without anti-reflection coating. Changing the silicon nanowire (SiNW) structure from conventional symmetric to asymmetric nature improves the efficiency due to increased short circuit current density. From numerical simulation and measurement of the optical characteristics, the total reflection on the sidewalls is seen to increase the light trapping path and charge carrier generation in the radial junction of the asymmetric SiNW, yielding high external quantum efficiency and short circuit current density. The proposed asymmetric structure has great potential to effectively improve the efficiency of the SiNW solar cells. Nature Publishing Group 2015-07-08 /pmc/articles/PMC4495391/ /pubmed/26152914 http://dx.doi.org/10.1038/srep11646 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ko, Myung-Dong
Rim, Taiuk
Kim, Kihyun
Meyyappan, M.
Baek, Chang-Ki
High efficiency silicon solar cell based on asymmetric nanowire
title High efficiency silicon solar cell based on asymmetric nanowire
title_full High efficiency silicon solar cell based on asymmetric nanowire
title_fullStr High efficiency silicon solar cell based on asymmetric nanowire
title_full_unstemmed High efficiency silicon solar cell based on asymmetric nanowire
title_short High efficiency silicon solar cell based on asymmetric nanowire
title_sort high efficiency silicon solar cell based on asymmetric nanowire
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4495391/
https://www.ncbi.nlm.nih.gov/pubmed/26152914
http://dx.doi.org/10.1038/srep11646
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