NDLI: Effects of Nanometer-Scale Photonic Crystal Structures on the Light Extraction From GaN Light-Emitting Diodes

Content Provider	IEEE Xplore Digital Library
Author	Young Chul Shin Dong Ho Kim Dong Ju Chae Ji Won Yang Jae In Shim Joong Mok Park Kai-Ming Ho Constant, K. Han Youl Ryu Tae Geun Kim
Copyright Year	1965
Abstract	This paper reports on the effect of nanometer-scale photonic crystal structures on the enhancement of the light extraction in GaN light-emitting diodes. Photonic crystals with hole or pillar-patterned structures with lattice constants of 460, 600, 750, and 920 nm are fabricated on indium-doped tin oxide (ITO) electrodes and/or p-GaN layers using laser holography and reactive ion etching. It is found that the light extraction efficiency depends strongly on the distance between the photonic crystal and the active layer, as well as the lattice constant for both structures. Photonic crystal light-emitting diodes (LEDs) with a lattice constant of 750 nm and hole depths of 260 nm in the ITO layer show an increase in light extraction of up to 32%, compared to conventional LEDs, without degradation in the electrical properties while a maximum enhancement of 26% is obtained from the device with a lattice constant of 460 nm and pillar heights of 60 nm on the p-GaN layer. The dependence of the extraction efficiency on the lattice constant is also calculated using a 3-D finite-difference time-domain method and compared with experimental results.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1375
Ending Page	1380
Page Count	6
File Size	3134336
File Format	PDF
ISSN	00189197
Volume Number	46
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nanostructures Photonic crystals Gallium nitride Light emitting diodes Lattices Indium tin oxide Electrodes Holography Etching Degradation photonic crystals light extraction efficiency light-emitting diode
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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