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Proceedings Paper

Electroluminescence in nanostructures of different dimensionalities: a comparative simulation study
Author(s): Sebastian Steiger; Ratko G. Veprek; Bernd Witzigmann
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Paper Abstract

We employ our simulation framework TDKP/AQUA to investigate bulk, planar quantum-well and V-groove quantum-wire light-emitting diodes. Carrier transport and spontaneous light emission are calculated self-consistently for all degrees of quantization. The simulation is based on a semi-coherent picture of drift and diffusion along unquantized directions whereas confinement and luminescence are calculated from a multiband Schroedinger equation in the confined directions. The three structures with different quantization degrees are compared with respect to light conversion efficiency and overall output power. It is shown that carrier confinement greatly improves the radiative conversion efficiency but at the same time limits output power and enhances carrier leakage into the minority regions due to a reduced density of states.

Paper Details

Date Published: 13 February 2009
PDF: 11 pages
Proc. SPIE 7211, Physics and Simulation of Optoelectronic Devices XVII, 72110O (13 February 2009); doi: 10.1117/12.807829
Show Author Affiliations
Sebastian Steiger, ETH Zürich (Switzerland)
Ratko G. Veprek, ETH Zürich (Switzerland)
Bernd Witzigmann, ETH Zürich (Switzerland)
Univ. of Kassel (Germany)


Published in SPIE Proceedings Vol. 7211:
Physics and Simulation of Optoelectronic Devices XVII
Marek Osinski; Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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