Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

Nan Guan (1) , Nuño Amador-Mendez (1) , Arup Kunti (1) , Andrey Babichev (2) , Subrata Das (3) , Akanksha Kapoor (4) , Noëlle Gogneau (1) , Joël Eymery (5) , François Henri Julien (1) , Christophe Durand (4) , Maria Tchernycheva (1)

1 C2N - Centre de Nanosciences et de Nanotechnologies
2 ITMO University [Russia]
3 CSIR - National Institute for Interdisciplinary Science and Technology
4 PHELIQS - PHotonique, ELectronique et Ingénierie QuantiqueS
5 NRS - Nanostructures et Rayonnement Synchrotron

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.

Mots clés: nanowire; LED; InGaN; mechanical flexibility; self-heating

Domaines: Matériaux; Micro et nanotechnologies/Microélectronique; Optique / photonique

Nan Guan, Nuño Amador-Mendez, Arup Kunti, Andrey Babichev, Subrata Das, et al.. Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes. Nanomaterials, 2020, 10 (11), pp.2271. ⟨10.3390/nano10112271⟩. ⟨hal-03019913⟩