eprintid: 8346
rev_number: 21
eprint_status: archive
userid: 1567
dir: disk0/00/00/83/46
datestamp: 2016-04-22 08:53:01
lastmod: 2016-10-10 09:10:03
status_changed: 2016-04-22 08:53:01
type: article
metadata_visibility: show
title: The effect of current crowding on the heat and light pattern in high-power AlGaAs light emitting diodes
language: english
abstract: The results of the light and temperature micromapping in AlGaAs light emitting diodes grown by
liquid phase epitaxy as double heterostructures and emitting at ��0.87 �m are presented. At a
driving current well above the safe operating limit ��300 mA�, the nonuniform light pattern and
local self-heating �with temperature gradient of about 950 °C/cm� followed by catastrophic
degradation of a device were detected with the charge coupled device and infrared microscopes
operating in a pulsed mode. These were shown to result from the current crowding effect in the active and contact areas of a device. Good agreement between the theory and experiment was found
keywords: current crowding, AlGaAs , temperature gradient
creators_name: Zinovchuk, A. V.
creators_name: Malyutenko, O. Yu.
creators_name: Malyutenko, V. K.
creators_name: Podoltsev, A. D.
creators_name: Vilisov, A. A.
ispublished: pub
subjects: QC
divisions: sch_phy
full_text_status: public
date: 2008
date_type: published
publication: Journal Of Applied Physics
volume: 104
publisher: American Institute of Physics
refereed: TRUE
issn: 1089-7550
official_url: http://jap.aip.org/
citation:   Zinovchuk, A. V., Malyutenko, O. Yu., Malyutenko, V. K., Podoltsev, A. D., Vilisov, A. A.  (2008) The effect of current crowding on the heat and light pattern in high-power AlGaAs light emitting diodes.  Journal Of Applied Physics, 104.   ISSN 1089-7550     
document_url: http://eprints.zu.edu.ua/8346/1/JAPIAU1043033115_1.pdf