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Proceedings Paper

Luminescence and efficiency optimization of InGaN/GaN core-shell nanowire LEDs by numerical modelling
Author(s): Friedhard Römer; Marcus Deppner; Zhelio Andreev; Christopher Kölper; Matthias Sabathil; Martin Strassburg; Johannes Ledig; Shunfeng Li; Andreas Waag; Bernd Witzigmann
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Paper 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.

Paper Details

Date Published: 28 February 2012
PDF: 9 pages
Proc. SPIE 8255, Physics and Simulation of Optoelectronic Devices XX, 82550H (28 February 2012); doi: 10.1117/12.908207
Show Author Affiliations
Friedhard Römer, Univ. Kassel (Germany)
Marcus Deppner, Univ. Kassel (Germany)
Zhelio Andreev, Univ. Kassel (Germany)
Christopher Kölper, Univ. Kassel (Germany)
Osram Opto Semiconductors GmbH (Germany)
Matthias Sabathil, Osram Opto Semiconductors GmbH (Germany)
Martin Strassburg, Osram Opto Semiconductors GmbH (Germany)
Johannes Ledig, Technische Univ. Braunschweig (Germany)
Shunfeng Li, Technische Univ. Braunschweig (Germany)
Andreas Waag, Technische Univ. Braunschweig (Germany)
Bernd Witzigmann, Univ. Kassel (Germany)

Published in SPIE Proceedings Vol. 8255:
Physics and Simulation of Optoelectronic Devices XX
Bernd Witzigmann; Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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