Improved current spreading in 370nm AlGaN microring light emitting diodes

H.W. Choi, M.D. Dawson

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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.
Original languageEnglish
JournalApplied Physics Letters
Volume86
Issue number053504
DOIs
Publication statusPublished - 2005

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Keywords

  • photonics
  • optics
  • diodes
  • geometry
  • applied physics

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