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28 February 2012 Luminescence and efficiency optimization of InGaN/GaN core-shell nanowire LEDs by numerical modelling
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Abstract
We present a computational study on the anisotropic luminescence and the efficiency of a core-shell type nanowire LED based on GaN with InGaN active quantum wells. The physical simulator used for analyzing this device integrates a multidimensional drift-diffusion transport solver and a k · p Schr¨odinger problem solver for quantization effects and luminescence. The solution of both problems is coupled to achieve self-consistency. Using this solver we investigate the effect of dimensions, design of quantum wells, and current injection on the efficiency and luminescence of the core-shell nanowire LED. The anisotropy of the luminescence and re-absorption is analyzed with respect to the external efficiency of the LED. From the results we derive strategies for design optimization.
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Friedhard Römer, Marcus Deppner, Zhelio Andreev, Christopher Kölper, Matthias Sabathil, Martin Strassburg, Johannes Ledig, Shunfeng Li, Andreas Waag, and Bernd Witzigmann "Luminescence and efficiency optimization of InGaN/GaN core-shell nanowire LEDs by numerical modelling", Proc. SPIE 8255, Physics and Simulation of Optoelectronic Devices XX, 82550H (28 February 2012); doi: 10.1117/12.908207; https://doi.org/10.1117/12.908207
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