کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1786240 1023410 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-voltage blue light emission from n-ZnO/p-GaN heterojunction formed by RF magnetron sputtering method
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Low-voltage blue light emission from n-ZnO/p-GaN heterojunction formed by RF magnetron sputtering method
چکیده انگلیسی


• Highly crystalline ZnO films were grown on p-GaN wafer via RF magnetron sputtering.
• A low threshold emission forward-voltage of 2.7 V was demonstrated.
• Stable blue light emission at ∼460 nm were emitted.
• The origins of the EL emissions were studied.

High quality n-ZnO/p-GaN heterojunction was fabricated by growing highly crystalline ZnO epitaxial films on commercial p-type GaN substrates via radio frequency (RF) magnetron sputtering. Low-voltage blue light emitting diode with a turn-on voltage of ∼2.5 V from the n-ZnO/p-GaN heterojunction was demonstrated. The diode gives a bright blue light emission located at ∼460 nm and a low threshold voltage of 2.7 V for emission. Based on the results of the photoluminescence (PL) and electroluminescence (EL) spectra, the origins of the EL emissions were studied in the light of energy band diagrams of ZnO–GaN heterojunction, and may attribute to the radiative recombination of the holes in p-GaN and the electrons injected from n-ZnO, which almost happened on the side of p-GaN layer. These results may have important implications for developing short wavelength optoelectronic devices.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 14, Issue 3, March 2014, Pages 345–348
نویسندگان
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