The effect of current crowding on the heat and light pattern in high-power AlGaAs light emitting diodes

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

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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

Тип елементу : Стаття
Ключові слова: current crowding, AlGaAs , temperature gradient
Теми: Q Наука > QC Фізика
Підрозділи: Фізико-математичний факультет > Кафедра фізики та методики її навчання
Користувач, що депонує: Богдан Свищ
Дата внесення: 22 Квіт 2016 08:53
Останні зміни: 10 Жов 2016 09:10
URI: http://eprints.zu.edu.ua/id/eprint/8346

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