کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5353938 1503680 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical potentiostatic activation for improvement of internal quantum efficiency of 385-nm ultraviolet light-emitting diodes
ترجمه فارسی عنوان
فعال سازی پتانسیواستاتیک الکتروشیمیایی برای بهبود راندمان کوانتومی داخلی دیودهای نوری ماوراء بنفش 385 نانومتری
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
The electrochemical potentiostatic activation (EPA) method is proven to effectively improve the internal quantum efficiency (IQE) of 385-nm ultraviolet light-emitting diodes (UV-LEDs). UV-LEDs wafers were immersed into 1.0 M HCl solution, and an electric voltage of 3.0 V was applied to the p-type GaN layer in order to increase the hole concentration by breaking the MgH complex. Secondary ion mass spectroscopy analysis clearly indicates the successful removal of hydrogen atoms by the EPA process, which is a ∼35% reduction of the hydrogen concentration compared to the conventional N2 annealing. The light-output power was enhanced by ∼20% at an input current of 50 mA, which originated from an improvement of the IQE by ∼20%. The reverse leakage current was also lowered by about one order after the EPA process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 283, 15 October 2013, Pages 521-524
نویسندگان
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