Efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes with nonuniform current spreading

Kudryk, Y. Y., Zinovchuk, A. V. (2011) Efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes with nonuniform current spreading. Semiconductor Science and Technology, 26. 095007-1. ISSN 1361-6641

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Опис

We demonstrate that the efficiency droop phenomenon in multiple quantum well InGaN/GaN light-emitting diodes (LEDs) may be connected to the current crowding effect. A numerical model of internal quantum efficiency calculation is presented that takes into account nonuniform lateral carrier injection in the active region. Based on this model, we examine the effect of current crowding on the efficiency droop using comparison of simulated internal quantum efficiency of InGaN LEDs with low and high uniformity of current spreading. The results of simulations and measurements show that the devices with low uniformity of current spreading exhibit higher efficiency droop and lower roll-off current value.

Тип елементу : Стаття
Ключові слова: Efficiency droop, InGaN/GaN, nonuniform current spreading
Теми: Q Наука > QC Фізика
Підрозділи: Фізико-математичний факультет > Кафедра фізики та методики її навчання
Користувач, що депонує: Богдан Свищ
Дата внесення: 21 Лист 2012 12:10
Останні зміни: 10 Жов 2016 09:08
URI: http://eprints.zu.edu.ua/id/eprint/8351

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