Heat Dissipation in Flexible Nitride Nanowire Light-Emitting Diodes

Nanomaterials

Arup Kunti¹  Noëlle Gogneau¹  Nuño Amador-Mendez¹  Nan Guan¹  François Henri Julien¹  Maria Tchernycheva¹  Andrey Babichev²  Subrata Das³  Joël Eymery⁴  Akanksha Kapoor⁵  Christophe Durand⁵ 

[1] C2N-CNRS, Université Paris Saclay, 91120 Palaiseau, France;ITMO University, 197101 Saint Petersburg, Russia;Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India;Univ. Grenoble Alpes, CEA, IRIG, MEM, NRS, 38000 Grenoble, France;Univ. Grenoble Alpes, CEA, IRIG, PHELIQS, NPSC, 38000 Grenoble, France;

关键词: nanowire;    LED;    InGaN;    mechanical flexibility;    self-heating;   

DOI  :  10.3390/nano10112271

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown