Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

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Title:	Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes
Authors:	Guan, N Mendez, N A Kunti, A Babichev, A Das, S Kapoor, A Gogneau, N Eymery, J Julien, F H Durand, C Tchernycheva, M
Keywords:	nanowire LED InGaN mechanical flexibility self-heating
Issue Date:	16-Nov-2020
Publisher:	MDPI
Citation:	Nanomaterials;10(11):Article ID:2271
Abstract:	We analyze the thermal behavior of a flexible nanowire (NW) light-emitting diode (LED) operated under different injection conditions. The LED is based on metal–organic vapor-phase deposition (MOCVD)-grown self-assembled InGaN/GaN NWs in a polydimethylsiloxane (PDMS) matrix. Despite the poor thermal conductivity of the polymer, active nitride NWs effectively dissipate heat to the substrate. Therefore, the flexible LED mounted on a copper heat sink can operate under high injection without significant overheating, while the device mounted on a plastic holder showed a 25% higher temperature for the same injected current. The efficiency of the heat dissipation by nitride NWs was further confirmed with finite-element modeling of the temperature distribution in a NW/polymer composite membrane.
URI:	https://doi.org/10.3390/nano10112271 http://localhost:8080/xmlui/handle/123456789/4266
Appears in Collections:	2020

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