TITLE

Improved current spreading in 370 nm AlGaN microring light emitting diodes

AUTHOR(S)
Choi, H. W.; Dawson, M. D.
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/31/2005, Vol. 86 Issue 5, p053504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electrical and optical characteristics of a 370 nm AlGaN light-emitting diode based on a microring geometry is presented. By structuring the light emission area into an interconnected array of microscale rings, current spreading in the n-type cladding layers is improved. A reduction of differential series resistance is observed, and the device saturates at a higher current as the carriers are injected efficiently and uniformly across the junction areas. As a result, optical output power from the microring light-emitting diode is improved compared to a conventional device of broad area geometry.
ACCESSION #
16345348

 

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