Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells

Abstract We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an “anti-reflection” pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversi...

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Autores principales:	Haitong Yu, Dong Liu, Zhen Yang, Yuanyuan Duan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/63859f601a5b4423bf24dd103831d959
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spelling	oai:doaj.org-article:63859f601a5b4423bf24dd103831d9592021-12-02T16:07:01ZSimple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells10.1038/s41598-017-01197-22045-2322https://doaj.org/article/63859f601a5b4423bf24dd103831d9592017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01197-2https://doaj.org/toc/2045-2322Abstract We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an “anti-reflection” pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversion efficiency. The system in this study is a 200-nm gap TPV power generation system with a planar infrared plasmonic emitter and GaSb cell. Rigorous coupled-wave analysis is used to calculate the spectral near-field radiative flux involving periodic structures. The simulation shows that when coupled with a near-infrared plasmonic bulk emitter, adding gratings on the GaSb cell surface results in strong spectral enhancement above the cell’s bandgap and suppression for low-energy photon transmission, an effect that cannot be fully predicted by the effective medium theory. The resultant peak spectral heat flux is 2.8 times as high as the case without surface structures and the radiative transfer efficiency increased to 24.8% from the original 14.5% with the emitter temperature at 1800 K. The influence of the grating’s geometry parameters on the enhancement and peak frequency is further discussed with rigorous calculation of the spatial distribution of thermal radiative transfer that provided insight into the physical mechanism.Haitong YuDong LiuZhen YangYuanyuan DuanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Haitong Yu Dong Liu Zhen Yang Yuanyuan Duan Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
description	Abstract We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an “anti-reflection” pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversion efficiency. The system in this study is a 200-nm gap TPV power generation system with a planar infrared plasmonic emitter and GaSb cell. Rigorous coupled-wave analysis is used to calculate the spectral near-field radiative flux involving periodic structures. The simulation shows that when coupled with a near-infrared plasmonic bulk emitter, adding gratings on the GaSb cell surface results in strong spectral enhancement above the cell’s bandgap and suppression for low-energy photon transmission, an effect that cannot be fully predicted by the effective medium theory. The resultant peak spectral heat flux is 2.8 times as high as the case without surface structures and the radiative transfer efficiency increased to 24.8% from the original 14.5% with the emitter temperature at 1800 K. The influence of the grating’s geometry parameters on the enhancement and peak frequency is further discussed with rigorous calculation of the spatial distribution of thermal radiative transfer that provided insight into the physical mechanism.
format	article
author	Haitong Yu Dong Liu Zhen Yang Yuanyuan Duan
author_facet	Haitong Yu Dong Liu Zhen Yang Yuanyuan Duan
author_sort	Haitong Yu
title	Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
title_short	Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
title_full	Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
title_fullStr	Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
title_full_unstemmed	Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells
title_sort	simple rectangular gratings as a near-field “anti-reflection” pattern for gasb tpv cells
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/63859f601a5b4423bf24dd103831d959
work_keys_str_mv	AT haitongyu simplerectangulargratingsasanearfieldantireflectionpatternforgasbtpvcells AT dongliu simplerectangulargratingsasanearfieldantireflectionpatternforgasbtpvcells AT zhenyang simplerectangulargratingsasanearfieldantireflectionpatternforgasbtpvcells AT yuanyuanduan simplerectangulargratingsasanearfieldantireflectionpatternforgasbtpvcells
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Simple Rectangular Gratings as a Near-Field “Anti-Reflection” Pattern for GaSb TPV Cells

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