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
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کلمات کلیدی
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 1.0Â M HCl solution, and an electric voltage of 3.0Â 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 â¼35% reduction of the hydrogen concentration compared to the conventional N2 annealing. The light-output power was enhanced by â¼20% at an input current of 50Â mA, which originated from an improvement of the IQE by â¼20%. 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
Journal: Applied Surface Science - Volume 283, 15 October 2013, Pages 521-524
نویسندگان
Hee Seok Choi, Hak Jun Kim, Jung Ju Lee, Hyo Won Seo, Wael Z. Tawfik, Jun-Seok Ha, Sang-Wan Ryu, Seong Ran Jun, Tak Jeong, June Key Lee,