Solar cell design using graphene-based hollow nano-pillars

Abstract In this paper, the full solar spectrum coverage with an absorption efficiency above 96% is attained by shell-shaped graphene-based hollow nano-pillars on top of the refractory metal substrate. The material choice guarantees the high thermal stability of the device along with its robustness...

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Autores principales:	Shiva Hayati Raad, Zahra Atlasbaf
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/499685962a26416e851c6f5c0fa9175d
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spelling	oai:doaj.org-article:499685962a26416e851c6f5c0fa9175d2021-12-02T15:07:54ZSolar cell design using graphene-based hollow nano-pillars10.1038/s41598-021-95684-22045-2322https://doaj.org/article/499685962a26416e851c6f5c0fa9175d2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95684-2https://doaj.org/toc/2045-2322Abstract In this paper, the full solar spectrum coverage with an absorption efficiency above 96% is attained by shell-shaped graphene-based hollow nano-pillars on top of the refractory metal substrate. The material choice guarantees the high thermal stability of the device along with its robustness against harsh environmental conditions. To design the structure, constitutive parameters of graphene material in the desired frequency range are investigated and its absorption capability is illustrated by calculating the attenuation constant of the electromagnetic wave. It is observed that broadband absorption is a consequence of wideband retrieved surface impedance matching with the free-space intrinsic impedance due to the tapered geometry. Moreover, the azimuthal and longitudinal cavity resonances with different orders are exhibited for a better understanding of the underlying wideband absorption mechanism. Importantly, the device can tolerate the oblique incidence in a wide span around 65°, regardless of the polarization. The proposed structure can be realized by large-area fabrication techniques.Shiva Hayati RaadZahra AtlasbafNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shiva Hayati Raad Zahra Atlasbaf Solar cell design using graphene-based hollow nano-pillars
description	Abstract In this paper, the full solar spectrum coverage with an absorption efficiency above 96% is attained by shell-shaped graphene-based hollow nano-pillars on top of the refractory metal substrate. The material choice guarantees the high thermal stability of the device along with its robustness against harsh environmental conditions. To design the structure, constitutive parameters of graphene material in the desired frequency range are investigated and its absorption capability is illustrated by calculating the attenuation constant of the electromagnetic wave. It is observed that broadband absorption is a consequence of wideband retrieved surface impedance matching with the free-space intrinsic impedance due to the tapered geometry. Moreover, the azimuthal and longitudinal cavity resonances with different orders are exhibited for a better understanding of the underlying wideband absorption mechanism. Importantly, the device can tolerate the oblique incidence in a wide span around 65°, regardless of the polarization. The proposed structure can be realized by large-area fabrication techniques.
format	article
author	Shiva Hayati Raad Zahra Atlasbaf
author_facet	Shiva Hayati Raad Zahra Atlasbaf
author_sort	Shiva Hayati Raad
title	Solar cell design using graphene-based hollow nano-pillars
title_short	Solar cell design using graphene-based hollow nano-pillars
title_full	Solar cell design using graphene-based hollow nano-pillars
title_fullStr	Solar cell design using graphene-based hollow nano-pillars
title_full_unstemmed	Solar cell design using graphene-based hollow nano-pillars
title_sort	solar cell design using graphene-based hollow nano-pillars
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/499685962a26416e851c6f5c0fa9175d
work_keys_str_mv	AT shivahayatiraad solarcelldesignusinggraphenebasedhollownanopillars AT zahraatlasbaf solarcelldesignusinggraphenebasedhollownanopillars
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Solar cell design using graphene-based hollow nano-pillars

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