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Optimization of Light-Diffracting Photonic-Crystals for High Extraction Efficiency LEDs

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3 Author(s)
Aurlien David ; Mater. Dept., California Univ., Santa Barbara, CA ; Henri Benisty ; Claude Weisbuch

Photonic-crystal (PhC)-assisted light extraction is a promising method for ultrahigh efficiency, planar light-emitting diodes (LEDs). However, modeling of such structures is challenging due to the variety of their parameters and the heavy computational burden they represent. We present a thorough theoretical discussion of the optimization of PhC LEDs, which relies both on approximate treatments and on rigorous 3-D calculations. Two material systems (GaAs and GaN) are investigated, leading to quite different optimal regimes. Notably, it appears that besides the properties of the 2-D PhC itself, design of the vertical structure plays a major role in optimization

Published in:

Journal of Display Technology  (Volume:3 ,  Issue: 2 )