Enhanced areal efficiency from 370nm AlGaN micro-ring light emitting diodes

H.W. Choi, M.D. Dawson

Research output: Contribution to journalArticlepeer-review


The electrical and optical characteristics of a 370 nm AlGaN light-emitting diode device based on a microring-array geometry are presented. By structuring the light emission area into an interconnected array of micro-scale rings, the directed light extraction efficiency is enhanced, and 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.
Original languageEnglish
Pages (from-to)2854-2857
Number of pages3
JournalPhysica Status Solidi C
Issue number7
Publication statusPublished - 2005


  • light emission
  • optics
  • geometry


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