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Proceedings Paper

16.8% external quantum efficiency from a planar LED
Author(s): Christian Dill; Ross P. Stanley; Ursula Oesterle; Marc Ilegems
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Paper Abstract

Efficient, cheap, and simple, LEDs are used in many applications and make up the bulk of the opto-electronic component market. Due to the small critical angle at the semiconductor-air interface, relatively little light escapes per facet. The conventional route is to collect light from all six facets and redirect it, using external reflectors into a useful direction. While this increases external quantum efficiency it does little to increase brightness. In the last few years the microcavity approach has been used to persuade the light to leave by just one facet, thus increasing the brightness considerably. Although remarkable efficiencies have been achieved, microcavity LEDs (MCLEDs) have yet to surpass conventional LEDs. We present here a single mirror LED, grown by MBE, which falls between the conventional LED and the planar MCLED.

Paper Details

Date Published: 14 April 1999
PDF: 10 pages
Proc. SPIE 3621, Light-Emitting Diodes: Research, Manufacturing, and Applications III, (14 April 1999); doi: 10.1117/12.344475
Show Author Affiliations
Christian Dill, Ecole Polytechnique Federale de Lausanne (Switzerland)
Ross P. Stanley, Ecole Polytechnique Federale de Lausanne (Switzerland)
Ursula Oesterle, Ecole Polytechnique Federale de Lausanne (Switzerland)
Marc Ilegems, Ecole Polytechnique Federale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 3621:
Light-Emitting Diodes: Research, Manufacturing, and Applications III
E. Fred Schubert; Ian T. Ferguson; H. Walter Yao, Editor(s)

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