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Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion

An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challen...

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Autores principales: Lin, Keng-Te, Lin, Han, Yang, Tieshan, Jia, Baohua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069956/
https://www.ncbi.nlm.nih.gov/pubmed/32170054
http://dx.doi.org/10.1038/s41467-020-15116-z
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author Lin, Keng-Te
Lin, Han
Yang, Tieshan
Jia, Baohua
author_facet Lin, Keng-Te
Lin, Han
Yang, Tieshan
Jia, Baohua
author_sort Lin, Keng-Te
collection PubMed
description An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challenging to achieve simultaneously using conventional materials and structures. Here, we propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective absorption, excellent photothermal performance, and high thermal stability. Impressive solar-to-thermal conversion efficiency of 90.1% and solar-to-vapor efficiency of 96.2% have been achieved. These superior properties of the SGM absorber suggest it has a great potential for practical applications of solar thermal energy harvesting and manipulation.
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spelling pubmed-70699562020-03-18 Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion Lin, Keng-Te Lin, Han Yang, Tieshan Jia, Baohua Nat Commun Article An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challenging to achieve simultaneously using conventional materials and structures. Here, we propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective absorption, excellent photothermal performance, and high thermal stability. Impressive solar-to-thermal conversion efficiency of 90.1% and solar-to-vapor efficiency of 96.2% have been achieved. These superior properties of the SGM absorber suggest it has a great potential for practical applications of solar thermal energy harvesting and manipulation. Nature Publishing Group UK 2020-03-13 /pmc/articles/PMC7069956/ /pubmed/32170054 http://dx.doi.org/10.1038/s41467-020-15116-z Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lin, Keng-Te
Lin, Han
Yang, Tieshan
Jia, Baohua
Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title_full Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title_fullStr Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title_full_unstemmed Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title_short Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
title_sort structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069956/
https://www.ncbi.nlm.nih.gov/pubmed/32170054
http://dx.doi.org/10.1038/s41467-020-15116-z
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