Guan Nan, Amador-Mendez Nuño, Kunti Arup, Babichev Andrey, Das Subrata, Kapoor Akanksha, Gogneau Noëlle, Eymery Joël, Julien François Henri, Durand Christophe, Tchernycheva Maria
C2N-CNRS, Université Paris Saclay, 91120 Palaiseau, France.
ITMO University, 197101 Saint Petersburg, Russia.
Nanomaterials (Basel). 2020 Nov 16;10(11):2271. doi: 10.3390/nano10112271.
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.
我们分析了在不同注入条件下工作的柔性纳米线（NW）发光二极管（LED）的热行为。该LED基于在聚二甲基硅氧烷（PDMS）基质中通过金属有机气相沉积（MOCVD）生长的自组装InGaN/GaN纳米线。尽管聚合物的热导率较差，但活性氮化物纳米线能有效地将热量散发到基板上。因此，安装在铜散热器上的柔性LED可以在高注入条件下工作而不会出现明显过热，而安装在塑料支架上的器件在相同注入电流下温度则高出25%。通过对NW/聚合物复合膜中温度分布的有限元建模，进一步证实了氮化物纳米线的散热效率。
