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Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

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.
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https://hal-cea.archives-ouvertes.fr/cea-03013366
Contributor : Joël Eymery <>
Submitted on : Wednesday, November 18, 2020 - 10:24:03 PM
Last modification on : Thursday, November 26, 2020 - 6:22:03 PM

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Nan Guan, Nuño Amador-Mendez, Arup Kunti, Andrey Babichev, Subrata Das, et al.. Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes. Nanomaterials, MDPI, 2020, 10 (11), pp.2271. ⟨10.3390/nano10112271⟩. ⟨cea-03013366⟩

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