%0 Journal Article
%@ 1089-7550
%A Zinovchuk, A. V.
%A Malyutenko, O. Yu.
%A Malyutenko, V. K.
%A Podoltsev, A. D.
%A Vilisov, A. A.
%D 2008
%F zu2:8346
%I American Institute of Physics
%J Journal Of Applied Physics
%K current crowding, AlGaAs , temperature gradient
%T The effect of current crowding on the heat and light pattern in high-power AlGaAs light emitting diodes
%U http://eprints.zu.edu.ua/8346/
%V 104
%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