Share Email Print
cover

Proceedings Paper

AlGaInP red-emitting light emitting diode under extremely high pulsed pumping
Author(s): Amit Yadav; Ilya E. Titkov; Grigorii S. Sokolovskii; Sergey Yu. Karpov; Vladislav V. Dudelev; Ksenya K. Soboleva; Martin Strassburg; Ines Pietzonka; Hans-Juergen Lugauer; Edik U. Rafailov
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Efficiency of commercial 620 nm AlGaInP Golden Dragon-cased high-power LEDs has been studied under extremely high pump current density up to 4.5 kA/cm2 and pulse duration from microsecond down to sub-nanosecond range. To understand the nature of LED efficiency decrease with current, pulse width variation is used. Analysis of the pulse-duration dependence of the LED efficiency and emission spectrum suggests the active region overheating to be the major factor controlling the LED efficiency reduction at CW and sub-microsecond pumping. The overheating can be effectively avoided by the use of sub-nanosecond current pulses. A direct correlation between the onset of the efficiency decrease and LED overheating is demonstrated.

Paper Details

Date Published: 8 March 2016
PDF: 7 pages
Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 97681K (8 March 2016); doi: 10.1117/12.2213344
Show Author Affiliations
Amit Yadav, Aston Univ. (United Kingdom)
Ilya E. Titkov, Aston Univ. (United Kingdom)
Grigorii S. Sokolovskii, Ioffe Physical-Technical Institute (Russian Federation)
Sergey Yu. Karpov, STR Group-Soft Impact Ltd. (Russian Federation)
Vladislav V. Dudelev, Ioffe Physical-Technical Institute (Russian Federation)
Ksenya K. Soboleva, Saint-Petersburg State Polytechnical Univ. (Russian Federation)
Martin Strassburg, OSRAM Opto Semiconductors GmbH (Germany)
Ines Pietzonka, OSRAM Opto Semiconductors GmbH (Germany)
Hans-Juergen Lugauer, OSRAM Opto Semiconductors GmbH (Germany)
Edik U. Rafailov, Aston Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 9768:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX
Heonsu Jeon; Li-Wei Tu; Michael R. Krames; Martin Strassburg, Editor(s)

© SPIE. Terms of Use
Back to Top