Efficient light-emitting diodes with radial outcoupling taper at 980- and 630-nm emission wavelength

Wolfgang Schmid; Marcus Scherer; Roland Jaeger; Peter Stauss; Klaus P. Streubel; Karl Joachim Ebeling

doi:10.1117/12.426839

14 May 2001 Efficient light-emitting diodes with radial outcoupling taper at 980- and 630-nm emission wavelength

Wolfgang Schmid, Marcus Scherer, Roland Jaeger, Peter Stauss, Klaus P. Streubel, Karl Joachim Ebeling

Proceedings Volume 4278, Light-Emitting Diodes: Research, Manufacturing, and Applications V; (2001) https://doi.org/10.1117/12.426839
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

We 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 a tapered mesa region. By proper processing we achieve quantum efficiencies of almost 40% for outcoupling via a planar surface or quantum and wallplug efficiencies of 52% and 48%, respectively, for encapsulated devices. Neglecting reabsorption, approximative equations yield optimum design parameters.

Citation Download Citation

Wolfgang Schmid, Marcus Scherer, Roland Jaeger, Peter Stauss, Klaus P. Streubel, and Karl Joachim Ebeling "Efficient light-emitting diodes with radial outcoupling taper at 980- and 630-nm emission wavelength", Proc. SPIE 4278, Light-Emitting Diodes: Research, Manufacturing, and Applications V, (14 May 2001); https://doi.org/10.1117/12.426839

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