Graphene-based autonomous pyroelectric system for near-field energy conversion

Abstract In the close vicinity of a hot solid, at distances smaller than the thermal wavelength, a strong electromagnetic energy density exists because of the presence of evanescent field. Here we introduce a many-body conversion principle to harvest this energy using graphene-based pyroelectric con...

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Autores principales: Ivan Latella, Philippe Ben-Abdallah
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/57d6ca025aa1410fa89097ec29c63dde
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spelling oai:doaj.org-article:57d6ca025aa1410fa89097ec29c63dde2021-12-02T17:17:38ZGraphene-based autonomous pyroelectric system for near-field energy conversion10.1038/s41598-021-98656-82045-2322https://doaj.org/article/57d6ca025aa1410fa89097ec29c63dde2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98656-8https://doaj.org/toc/2045-2322Abstract In the close vicinity of a hot solid, at distances smaller than the thermal wavelength, a strong electromagnetic energy density exists because of the presence of evanescent field. Here we introduce a many-body conversion principle to harvest this energy using graphene-based pyroelectric conversion devices made with an active layer encapsulated between two graphene field-effect transistors which are deposited on the source and on the cold sink. By tuning the bias voltage applied to the gates of these transistors, the thermal state and the spontaneous polarization of the active layer can be controlled at kHz frequencies. We demonstrate that the power density generated by these conversion systems can reach $$130\,{\rm mW\,cm}^{-2}$$ 130 mW cm - 2 using pyroelectric Ericsson cycles, a value which surpasses the current production capacity of near-field thermophotovoltaic conversion devices by more than three orders of magnitude with low grade heat sources ( $$T<500\,{\rm K}$$ T < 500 K ) and small temperature differences ( $$\Delta T\sim 100\,K$$ Δ T ∼ 100 K ).Ivan LatellaPhilippe Ben-AbdallahNature 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
Ivan Latella
Philippe Ben-Abdallah
Graphene-based autonomous pyroelectric system for near-field energy conversion
description Abstract In the close vicinity of a hot solid, at distances smaller than the thermal wavelength, a strong electromagnetic energy density exists because of the presence of evanescent field. Here we introduce a many-body conversion principle to harvest this energy using graphene-based pyroelectric conversion devices made with an active layer encapsulated between two graphene field-effect transistors which are deposited on the source and on the cold sink. By tuning the bias voltage applied to the gates of these transistors, the thermal state and the spontaneous polarization of the active layer can be controlled at kHz frequencies. We demonstrate that the power density generated by these conversion systems can reach $$130\,{\rm mW\,cm}^{-2}$$ 130 mW cm - 2 using pyroelectric Ericsson cycles, a value which surpasses the current production capacity of near-field thermophotovoltaic conversion devices by more than three orders of magnitude with low grade heat sources ( $$T<500\,{\rm K}$$ T < 500 K ) and small temperature differences ( $$\Delta T\sim 100\,K$$ Δ T ∼ 100 K ).
format article
author Ivan Latella
Philippe Ben-Abdallah
author_facet Ivan Latella
Philippe Ben-Abdallah
author_sort Ivan Latella
title Graphene-based autonomous pyroelectric system for near-field energy conversion
title_short Graphene-based autonomous pyroelectric system for near-field energy conversion
title_full Graphene-based autonomous pyroelectric system for near-field energy conversion
title_fullStr Graphene-based autonomous pyroelectric system for near-field energy conversion
title_full_unstemmed Graphene-based autonomous pyroelectric system for near-field energy conversion
title_sort graphene-based autonomous pyroelectric system for near-field energy conversion
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/57d6ca025aa1410fa89097ec29c63dde
work_keys_str_mv AT ivanlatella graphenebasedautonomouspyroelectricsystemfornearfieldenergyconversion
AT philippebenabdallah graphenebasedautonomouspyroelectricsystemfornearfieldenergyconversion
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