Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes.

Authors :: Guan N
Amador-Mendez N
Kunti A
Babichev A
Das S
Kapoor A
Gogneau N
Eymery J
Julien FH
Durand C
Tchernycheva M
Source :: Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2020 Nov 16; Vol. 10 (11). Date of Electronic Publication: 2020 Nov 16.
Publication Year :: 2020
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.