Title :
Optimization of Light-Diffracting Photonic-Crystals for High Extraction Efficiency LEDs
Author :
David, Aurélien ; Benisty, Henri ; Weisbuch, Claude
Author_Institution :
Mater. Dept., California Univ., Santa Barbara, CA
fDate :
6/1/2007 12:00:00 AM
Abstract :
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
Keywords :
gallium compounds; light emitting diodes; photonic crystals; GaAs; GaN; high extraction efficiency LED; light-diffracting photonic-crystals optimization; photonic-crystal assisted light extraction; planar light-emitting diodes; vertical structure; Crystalline materials; Diffraction; Displays; Gallium arsenide; Gallium nitride; III-V semiconductor materials; Light emitting diodes; Optimization methods; Photonic crystals; Semiconductor diodes; Light-emitting diodes (LEDs); light extraction; photonic crystal (PhC);
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2007.896736