AlGaInP red-emitting light emitting diode under extremely high pulsed pumping


Efficiency of commercial 620 nm InAlGaP 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. No efficiency decrease and negligible red shift of the emission wavelength is observed in the whole range of drive currents at nanosecond-range pulses with duty cycles well below 1%. Analysis of the pulse-duration dependence of the LED efficiency and emission spectrum suggests the active region overheating to be the major mechanism of the LED efficiency reduction at higher pumping, dominating over the electron overflow and Auger recombination.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Amit Yadav; Ilya E. Titkov; Grigorii S. Sokolovskii; Sergey Y. Karpov; Vladislav V. Dudelev; Ksenya K. Soboleva; Martin Strassburg; Ines Pietzonka; Hans-Juergen Lugauer and Edik U. Rafailov; "AlGaInP red-emitting light emitting diode under extremely high pulsed pumping", Proc. SPIE 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 97681K (March 8, 2016). Copyright 2016 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI:
Event Title: Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX
Event Type: Other
Event Dates: 2016-02-15 - 2016-02-28
Uncontrolled Keywords: AlGaInP LEDsE,efficiency droop,external quantum efficiency,self-heating,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
ISBN: 9781510600034
Last Modified: 19 Apr 2024 07:22
Date Deposited: 29 Feb 2016 13:55
Full Text Link: http://proceedi ... ticleid=2502339
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2016-03-08
Accepted Date: 2016-02-13
Authors: Yadav, Amit (ORCID Profile 0000-0001-7865-6905)
Titkov, Ilya
Sokolovskii, Grigorii S.
Karpov, Sergey Yu
Dudelev, Vladislav V.
Soboleva, Ksenya K.
Strassburg, Martin
Pietzonka, Ines
Lugauer, Hans-Juergen
Rafailov, Edik U. (ORCID Profile 0000-0002-4152-0120)



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