Efficiency droop in nitride LEDs revisited: Impact of excitonic recombination processes

机译：重新审视氮化物LED的效率下降：激子复合过程的影响

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The efficiency droop in nitride LEDs is currently attributed to either carrier-density-dependent nonradiative recombination or to carrier leakage, both being discussed in terms of a single-particle picture. Our time-resolved photoluminescence results show that the radiative lifetime is independent of carrier density, while the nonradiative lifetime scales with the inverse of the carrier density. This can not be understood in a single-particle model. By means of a many-particle theory approach we obtain a consistent picture with both radiative and Auger recombination enhanced by excitonic electron-hole correlation. In the high carrier density limit single-particle radiative and Auger recombination are recovered.

机译：氮化物LED的效率下降目前归因于与载流子密度有关的非辐射复合或归因于载流子泄漏，两者均以单粒子图像的形式进行了讨论。我们的时间分辨光致发光结果表明，辐射寿命与载流子密度无关，而非辐射寿命与载流子密度成反比。这在单粒子模型中无法理解。借助多粒子理论方法，我们获得了由激子电子-空穴相关增强的辐射和俄歇复合的一致图像。在高载流子密度极限中，恢复了单粒子辐射和俄歇复合。

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来源
《Gallium nitride materials and devices X》|2015年|93631R.1-93631R.7|共7页
会议地点 San Francisco CA(US)
作者
A. Hangleiter; T. Langer; M. Gerhard; D. Kalincev; A. Kruse; H. Bremers; U. Rossow; M. Koch;
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作者单位

Institute of Applied Physics, TU Braunschweig, Braunschweig, Germany;

Institute of Applied Physics, TU Braunschweig, Braunschweig, Germany;

Faculty of Physics, Philipps Universitaet Marburg, Marburg, Germany;

Faculty of Physics, Philipps Universitaet Marburg, Marburg, Germany;

Institute of Applied Physics, TU Braunschweig, Braunschweig, Germany;

Institute of Applied Physics, TU Braunschweig, Braunschweig, Germany;

Institute of Applied Physics, TU Braunschweig, Braunschweig, Germany;

Faculty of Physics, Philipps Universitaet Marburg, Marburg, Germany;

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原文格式 PDF
正文语种 eng
中图分类
关键词
group-Ⅲ nitrides; quantum wells; time-resolved photoluminescence; efficiency droop;

机译：Ⅲ族氮化物；量子阱时间分辨光致发光效率下降;

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专利

1. Interplay of polarization fields and Auger recombination in the efficiency droop of nitride light-emitting diodes [J] . Kioupakis Emmanouil, Yan Qimin, Van de Walle Chris G. Applied Physics Letters . 2012,第23期

机译：氮化物发光二极管效率下降中极化场和俄歇复合的相互作用
2. Interplay of polarization fields and Auger recombination in the efficiency droop of nitride light-emitting diodes [J] . Emmanouil Kioupakis, Qimin Yan, Chris G. Van de Walle Applied Physics Letters . 2012,第23期

机译：氮化物发光二极管效率下降中极化场和俄歇复合的相互作用
3. Indirect Auger recombination as a cause of efficiency droop in nitride light-emitting diodes [J] . Emmanouil Kioupakis, Patrick Rinke, Kris T. Delaney, Applied Physics Letters . 2011,第16期

机译：间接俄歇重组是氮化物发光二极管效率下降的原因
4. Efficiency droop in nitride LEDs revisited: Impact of excitonic recombination processes [C] . A. Hangleiter, T. Langer, M. Gerhard, Conference on gallium nitride materials and devices X . 2015

机译：氮化物LED中的效率下垂重新吻合：激子重组过程的影响
5. Engineering efficiency droop in indium gallium nitride/gallium nitride multiple quantum well LEDs [D] . Puttaswamy Gowda, Yashvanth B. 2012

机译：氮化铟镓/氮化镓多量子阱LED的工程效率下降
6. Unveiling Excitonic Dynamics in High‐Efficiency Nonfullerene Organic Solar Cells to Direct Morphological Optimization for Suppressing Charge Recombination [O] . Xiaoyu Liu, Yajie Yan, Alireza Honarfar, 2019

机译：揭示高效非富勒烯有机太阳能电池中的激子动力学以直接进行形态优化以抑制电荷复合。
7. Investigating the Efficiency Droop of Nitride-Based Blue LEDs with Different Quantum Barrier Growth Rates [O] . C. K. Wang, Y. Z. Chiou, H. J. Chang 2019

机译：用不同量子阻挡增速率研究氮化物基蓝光LED效率下降

Efficiency droop in nitride LEDs revisited: Impact of excitonic recombination processes

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