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

Volume

3

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

133

Lastpage

148

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);

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2007.896736

Filename

4211190