Air-ring microstructure arrays for enhanced light extraction from a face-up light-emitting diode

In this Letter, a light-emitting diode (LED) with prism-shaped-air-ring microstructures (PSAMs) formed on flat sapphire substrate is demonstrated as an alternative design to face-up LEDs on patterned sapphire substrate (PSS) for enhanced light extraction efficiency. In this LED design, the emitted p...

Full description

Saved in:
Bibliographic Details
Published in:Optics letters 2013-05, Vol.38 (9), p.1491-1493
Main Authors: Kim, Hyun Kyu, Park, Young Jae, Kang, Ji Hye, Han, Nam, Han, Min, Ryu, Beo Deul, Ko, Kang Bok, Yang, Jong Han, Kim, Young Taek, Chandramohan, S, Jeong, Hyun, Jeong, Mun Seok, Hong, Chang-Hee
Format: Article
Language:English
Subjects:
Arrays
Extraction
Injection current
Light-emitting diodes
Microstructure
Packaging
Photons
Sapphire
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this Letter, a light-emitting diode (LED) with prism-shaped-air-ring microstructures (PSAMs) formed on flat sapphire substrate is demonstrated as an alternative design to face-up LEDs on patterned sapphire substrate (PSS) for enhanced light extraction efficiency. In this LED design, the emitted photons can be deflected to the top of the chip for its effective extraction, contrary to the PSS-LED wherein photons are guided to sapphire and get absorbed by packaging materials. The PSAM-LED showed an enhancement in the radiometric power as high as 10% with a low far-field angle of 129° over that of a PSS-LED under an injection current of 20 mA.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.38.001491