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Effects of direct lateral Current Injection on the Performance, Overall Efficiency and Emission Distribution in GaN LED structures: a 2D Computational Study

Published online by Cambridge University Press:  23 June 2011

Pyry Kivisaari ,
Jani Oksanen  and
Jukka Tulkki
Pyry Kivisaari
Affiliation:
Department of Biomedical Engineering and Computational Science, Aalto University, P.O. Box 12200, 00076, Finland. pyry.kivisaari@tkk.fi
Jani Oksanen
Affiliation:
Department of Biomedical Engineering and Computational Science, Aalto University, P.O. Box 12200, 00076, Finland. pyry.kivisaari@tkk.fi
Jukka Tulkki
Affiliation:
Department of Biomedical Engineering and Computational Science, Aalto University, P.O. Box 12200, 00076, Finland. pyry.kivisaari@tkk.fi
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Abstract

We study and demonstrate the potential benefits of using a transverse junction structure in GaN LEDs by simulating and comparing the structure with conventional vertical injection structures.The direct current injection component enabled by the transverse structure significantly reduces the height of the polarization-induced potential barriers and facilitates the electron flow into the active material, improving the overall efficiency. In addition, the transverse junction structure enables a more even radiative recombination distribution from different quantum wells. We estimate the attainable optical output efficiency and also discuss the influence of the active layer design on the quantum efficiency. Based on the obtained results, shifting from the conventional 1-dimensional LED structures to genuinely 2-dimensional structures may allow new possibilities to optimize LED performance.

Keywords

nitrideoptoelectronicdiffusion
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1370: Symposium YY – Computational Semiconductor Materials Science , 2011 , mrss11-1370-yy05-05
Copyright
Copyright © Materials Research Society 2011

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