Microchannel contacting of crystalline silicon solar cells

Abstract There is tremendous interest in reducing losses caused by the metal contacts in silicon photovoltaics, particularly the optical and resistive losses of the front metal grid. One commonly sought-after goal is the creation of high aspect-ratio metal fingers which provide an optically narrow a...

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Autores principales:	James Bullock, Hiroki Ota, Hanchen Wang, Zhaoran Xu, Mark Hettick, Di Yan, Christian Samundsett, Yimao Wan, Stephanie Essig, Monica Morales-Masis, Andrés Cuevas, Ali Javey
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/add42f5a807642098a1bf72b773343db
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spelling	oai:doaj.org-article:add42f5a807642098a1bf72b773343db2021-12-02T11:40:14ZMicrochannel contacting of crystalline silicon solar cells10.1038/s41598-017-08913-y2045-2322https://doaj.org/article/add42f5a807642098a1bf72b773343db2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08913-yhttps://doaj.org/toc/2045-2322Abstract There is tremendous interest in reducing losses caused by the metal contacts in silicon photovoltaics, particularly the optical and resistive losses of the front metal grid. One commonly sought-after goal is the creation of high aspect-ratio metal fingers which provide an optically narrow and low resistance pathway to the external circuit. Currently, the most widely used metal contact deposition techniques are limited to widths and aspect-ratios of ~40 μm and ~0.5, respectively. In this study, we introduce the use of a micropatterned polydimethylsiloxane encapsulation layer to form narrow (~20 μm) microchannels, with aspect-ratios up to 8, on the surface of solar cells. We demonstrate that low temperature metal pastes, electroless plating and atomic layer deposition can all be used within the microchannels. Further, we fabricate proof-of-concept structures including simple planar silicon heterojunction and homojunction solar cells. While preliminary in both design and efficiency, these results demonstrate the potential of this approach and its compatibility with current solar cell architectures.James BullockHiroki OtaHanchen WangZhaoran XuMark HettickDi YanChristian SamundsettYimao WanStephanie EssigMonica Morales-MasisAndrés CuevasAli JaveyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q James Bullock Hiroki Ota Hanchen Wang Zhaoran Xu Mark Hettick Di Yan Christian Samundsett Yimao Wan Stephanie Essig Monica Morales-Masis Andrés Cuevas Ali Javey Microchannel contacting of crystalline silicon solar cells
description	Abstract There is tremendous interest in reducing losses caused by the metal contacts in silicon photovoltaics, particularly the optical and resistive losses of the front metal grid. One commonly sought-after goal is the creation of high aspect-ratio metal fingers which provide an optically narrow and low resistance pathway to the external circuit. Currently, the most widely used metal contact deposition techniques are limited to widths and aspect-ratios of ~40 μm and ~0.5, respectively. In this study, we introduce the use of a micropatterned polydimethylsiloxane encapsulation layer to form narrow (~20 μm) microchannels, with aspect-ratios up to 8, on the surface of solar cells. We demonstrate that low temperature metal pastes, electroless plating and atomic layer deposition can all be used within the microchannels. Further, we fabricate proof-of-concept structures including simple planar silicon heterojunction and homojunction solar cells. While preliminary in both design and efficiency, these results demonstrate the potential of this approach and its compatibility with current solar cell architectures.
format	article
author	James Bullock Hiroki Ota Hanchen Wang Zhaoran Xu Mark Hettick Di Yan Christian Samundsett Yimao Wan Stephanie Essig Monica Morales-Masis Andrés Cuevas Ali Javey
author_facet	James Bullock Hiroki Ota Hanchen Wang Zhaoran Xu Mark Hettick Di Yan Christian Samundsett Yimao Wan Stephanie Essig Monica Morales-Masis Andrés Cuevas Ali Javey
author_sort	James Bullock
title	Microchannel contacting of crystalline silicon solar cells
title_short	Microchannel contacting of crystalline silicon solar cells
title_full	Microchannel contacting of crystalline silicon solar cells
title_fullStr	Microchannel contacting of crystalline silicon solar cells
title_full_unstemmed	Microchannel contacting of crystalline silicon solar cells
title_sort	microchannel contacting of crystalline silicon solar cells
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/add42f5a807642098a1bf72b773343db
work_keys_str_mv	AT jamesbullock microchannelcontactingofcrystallinesiliconsolarcells AT hirokiota microchannelcontactingofcrystallinesiliconsolarcells AT hanchenwang microchannelcontactingofcrystallinesiliconsolarcells AT zhaoranxu microchannelcontactingofcrystallinesiliconsolarcells AT markhettick microchannelcontactingofcrystallinesiliconsolarcells AT diyan microchannelcontactingofcrystallinesiliconsolarcells AT christiansamundsett microchannelcontactingofcrystallinesiliconsolarcells AT yimaowan microchannelcontactingofcrystallinesiliconsolarcells AT stephanieessig microchannelcontactingofcrystallinesiliconsolarcells AT monicamoralesmasis microchannelcontactingofcrystallinesiliconsolarcells AT andrescuevas microchannelcontactingofcrystallinesiliconsolarcells AT alijavey microchannelcontactingofcrystallinesiliconsolarcells
_version_	1718395664449142784

Microchannel contacting of crystalline silicon solar cells

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