Enhanced light extraction efficiency from AlGaInP thin-film light-emitting diodes with photonic crystals

We investigate the use of photonic crystals for light extraction from high-brightness thin-film AlGaInP light-emitting diodes with different etch depths, lattice constants, and two types of lattices (hexagonal and Archimedean). Both simulations and experimental results show that the extraction of hi...

Full description

Saved in:

Bibliographic Details
Published in:	Applied physics letters Vol. 93; no. 4; pp. 041105 - 041105-3
Main Authors:	Bergenek, K., Wiesmann, Ch, Wirth, R., O'Faolain, L., Linder, N., Streubel, K., Krauss, T. F.
Format:	Journal Article
Language:	English
Published:	American Institute of Physics 28-07-2008
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	We investigate the use of photonic crystals for light extraction from high-brightness thin-film AlGaInP light-emitting diodes with different etch depths, lattice constants, and two types of lattices (hexagonal and Archimedean). Both simulations and experimental results show that the extraction of high order modes with a low effective index n eff is most efficient. The highest external quantum efficiency without encapsulation is 19% with an Archimedean A7 lattice with reciprocal lattice constant G = 1.5 k 0 , which is 47% better than an unstructured reference device.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.2963030