Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

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...

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Veröffentlicht in:	Nanomaterials (Basel, Switzerland) Switzerland), 2020-11, Vol.10 (11), p.2271
Hauptverfasser:	Guan, Nan, Amador-Mendez, Nuño, Kunti, Arup, Babichev, Andrey, Das, Subrata, Kapoor, Akanksha, Gogneau, Noëlle, Eymery, Joël, Julien, François Henri, Durand, Christophe, Tchernycheva, Maria
Format:	Artikel
Sprache:	eng
Schlagworte:	Accuracy Annealing Composite materials Engineering Sciences Finite element method Gallium nitrides Heat Heat conductivity Heat sinks High temperature InGaN Injection LED Light emitting diodes Materials Mathematical models mechanical flexibility Membranes Methods Micro and nanotechnologies Microelectronics Nanotechnology nanowire Nanowires Optics Overheating Photonic Polydimethylsiloxane Polymer matrix composites Polymers Self-assembly self-heating Substrates Temperature distribution Thermal conductivity Thermodynamic properties Wire
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Zusammenfassung:	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.
ISSN:	2079-4991 2079-4991
DOI:	10.3390/nano10112271