Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics

Investigation of solar energy harvesting in hexagonally arranged Si nanowire (NW) arrays is performed through optimizing the structural parameters, such as array periodicity (P), Si NW diameter (D) and length (L). The results demonstrate that there exist wide P and D/P 'windows' for the Si...

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Main Authors: Li, Junshuai, Yu, Hongyu, Li, Yali
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/97517
http://hdl.handle.net/10220/10638
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-975172020-03-07T14:02:47Z Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics Li, Junshuai Yu, Hongyu Li, Yali School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering Investigation of solar energy harvesting in hexagonally arranged Si nanowire (NW) arrays is performed through optimizing the structural parameters, such as array periodicity (P), Si NW diameter (D) and length (L). The results demonstrate that there exist wide P and D/P 'windows' for the Si NW arrays, locating around 600 nm and 0.833 (i.e., D = 500 nm), respectively, for achieving enhanced light absorption compared to their thin film counterparts with the same thickness, but with much less materials consumption. Calculation of the ultimate efficiency (UE) indicates that the light trapping capability is not monotonically increased with L, and that UE vibration is found when L is >1000 nm. Comparison of the light absorption spectra for hexagonally and squarely arranged Si NW arrays demonstrates that these two most widely employed array symmetries in practice have little impact on the light trapping capability. 2013-06-25T06:43:45Z 2019-12-06T19:43:30Z 2013-06-25T06:43:45Z 2019-12-06T19:43:30Z 2012 2012 Journal Article Li, J., Yu, H., & Li, Y. (2012). Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics. Nanotechnology, 23(19). 0957-4484 https://hdl.handle.net/10356/97517 http://hdl.handle.net/10220/10638 10.1088/0957-4484/23/19/194010 en Nanotechnology © 2012 IOP Publishing Ltd.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Li, Junshuai
Yu, Hongyu
Li, Yali
Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
description Investigation of solar energy harvesting in hexagonally arranged Si nanowire (NW) arrays is performed through optimizing the structural parameters, such as array periodicity (P), Si NW diameter (D) and length (L). The results demonstrate that there exist wide P and D/P 'windows' for the Si NW arrays, locating around 600 nm and 0.833 (i.e., D = 500 nm), respectively, for achieving enhanced light absorption compared to their thin film counterparts with the same thickness, but with much less materials consumption. Calculation of the ultimate efficiency (UE) indicates that the light trapping capability is not monotonically increased with L, and that UE vibration is found when L is >1000 nm. Comparison of the light absorption spectra for hexagonally and squarely arranged Si NW arrays demonstrates that these two most widely employed array symmetries in practice have little impact on the light trapping capability.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Li, Junshuai
Yu, Hongyu
Li, Yali
format Article
author Li, Junshuai
Yu, Hongyu
Li, Yali
author_sort Li, Junshuai
title Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
title_short Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
title_full Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
title_fullStr Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
title_full_unstemmed Solar energy harnessing in hexagonally arranged Si nanowire arrays and effects of array symmetry on optical characteristics
title_sort solar energy harnessing in hexagonally arranged si nanowire arrays and effects of array symmetry on optical characteristics
publishDate 2013
url https://hdl.handle.net/10356/97517
http://hdl.handle.net/10220/10638
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