Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications

Abstract The orthotropic material with the in-plane thermal conductivity much larger than the off-plane one can control the heat flow direction. This feature provides unique benefits in thermal management of micro-scale inorganic light-emitting diodes (μ-ILEDs) device for biointegrated applications...

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Autores principales:	Yuhang Li, Jin Chen, Yufeng Xing, Jizhou Song
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d607a48f80044a13b6873a0e6736ec8c
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spelling	oai:doaj.org-article:d607a48f80044a13b6873a0e6736ec8c2021-12-02T12:32:12ZThermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications10.1038/s41598-017-06798-52045-2322https://doaj.org/article/d607a48f80044a13b6873a0e6736ec8c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06798-5https://doaj.org/toc/2045-2322Abstract The orthotropic material with the in-plane thermal conductivity much larger than the off-plane one can control the heat flow direction. This feature provides unique benefits in thermal management of micro-scale inorganic light-emitting diodes (μ-ILEDs) device for biointegrated applications by helping the heat dissipation from μ-ILEDs along the in-plane directions to lower the μ-ILED temperature and prevent the heat dissipation to the tissue along the off-plane direction to ensure a low tissue temperature. Three-dimensional analytical models, accounting for the coupling between the Fourier heat conduction in the μ-ILED device and the Pennes bioheat transfer in the human skin, are established to investigate the thermal behaviors of μ-ILEDs on an orthotropic substrate integrated with the human skin. Both the operations of μ-ILEDs in a constant mode and pulsed mode are studied. The maximum temperature increases of μ-ILED and in the tissue are derived and their dependences on various parameters such as the thermal conductivities of the orthotropic substrate, substrate thickness, and loading parameters (e.g., duty cycle, pulse period) are investigated. These results pave the theoretical foundation for the thermal management of μ-ILED devices for biointegrated applications.Yuhang LiJin ChenYufeng XingJizhou SongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuhang Li Jin Chen Yufeng Xing Jizhou Song Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
description	Abstract The orthotropic material with the in-plane thermal conductivity much larger than the off-plane one can control the heat flow direction. This feature provides unique benefits in thermal management of micro-scale inorganic light-emitting diodes (μ-ILEDs) device for biointegrated applications by helping the heat dissipation from μ-ILEDs along the in-plane directions to lower the μ-ILED temperature and prevent the heat dissipation to the tissue along the off-plane direction to ensure a low tissue temperature. Three-dimensional analytical models, accounting for the coupling between the Fourier heat conduction in the μ-ILED device and the Pennes bioheat transfer in the human skin, are established to investigate the thermal behaviors of μ-ILEDs on an orthotropic substrate integrated with the human skin. Both the operations of μ-ILEDs in a constant mode and pulsed mode are studied. The maximum temperature increases of μ-ILED and in the tissue are derived and their dependences on various parameters such as the thermal conductivities of the orthotropic substrate, substrate thickness, and loading parameters (e.g., duty cycle, pulse period) are investigated. These results pave the theoretical foundation for the thermal management of μ-ILED devices for biointegrated applications.
format	article
author	Yuhang Li Jin Chen Yufeng Xing Jizhou Song
author_facet	Yuhang Li Jin Chen Yufeng Xing Jizhou Song
author_sort	Yuhang Li
title	Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
title_short	Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
title_full	Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
title_fullStr	Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
title_full_unstemmed	Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
title_sort	thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d607a48f80044a13b6873a0e6736ec8c
work_keys_str_mv	AT yuhangli thermalmanagementofmicroscaleinorganiclightemittngdiodesonanorthotropicsubstrateforbiointegratedapplications AT jinchen thermalmanagementofmicroscaleinorganiclightemittngdiodesonanorthotropicsubstrateforbiointegratedapplications AT yufengxing thermalmanagementofmicroscaleinorganiclightemittngdiodesonanorthotropicsubstrateforbiointegratedapplications AT jizhousong thermalmanagementofmicroscaleinorganiclightemittngdiodesonanorthotropicsubstrateforbiointegratedapplications
_version_	1718394184989147136

Thermal management of micro-scale inorganic light-emittng diodes on an orthotropic substrate for biointegrated applications

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