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Proceedings Paper

45% quantum-efficiency light-emitting diodes with radial outcoupling taper
Author(s): Wolfgang Schmid; Franz Eberhard; Roland Jaeger; Roger King; Michael Miller; J. Joos; Karl Joachim Ebeling
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Paper Abstract

10We have investigated efficient light outcoupling from light- emitting diodes (LEDs) by introducing lateral tapers. The concept is based on light generation in the very central area of a circularly symmetric structure. After propagating between two highly reflecting mirrors light is outcoupled in tapered mesa region. By proper processing we achieve quantum and wallplug efficiencies of almost 30% for outcoupling via a planar surface or, respectively, 45% and 44% for encapsulated devices.

Paper Details

Date Published: 17 April 2000
PDF: 8 pages
Proc. SPIE 3938, Light-Emitting Diodes: Research, Manufacturing, and Applications IV, (17 April 2000); doi: 10.1117/12.382841
Show Author Affiliations
Wolfgang Schmid, Univ. Ulm (Germany)
Franz Eberhard, Univ. Ulm (Germany)
Roland Jaeger, Univ. Ulm (Germany)
Roger King, Univ. Ulm (Germany)
Michael Miller, Univ. Ulm (Germany)
J. Joos, Univ. Ulm (Germany)
Karl Joachim Ebeling, Univ. Ulm (Germany)


Published in SPIE Proceedings Vol. 3938:
Light-Emitting Diodes: Research, Manufacturing, and Applications IV
H. Walter Yao; Ian T. Ferguson; E. Fred Schubert, Editor(s)

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