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
Анотація
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
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