%A A. V. Zinovchuk
%A O. Yu. Malyutenko
%A V. K. Malyutenko
%A A. D. Podoltsev
%A A. A. Vilisov
%J Journal Of Applied Physics
%T The effect of current crowding on the heat and light pattern in high-power AlGaAs light emitting diodes
%X 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
%K current crowding, AlGaAs , temperature gradient
%V 104
%D 2008
%I American Institute of Physics
%L zu28346