کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1795137 1023716 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of growth temperature of initial AlN buffer on the structural and optical properties of Al-rich AlGaN
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effect of growth temperature of initial AlN buffer on the structural and optical properties of Al-rich AlGaN
چکیده انگلیسی

High Al-content AlxGa1−xN epilayers with x=0.62–0.64 were grown on AlN buffer by low-pressure metalorganic chemical vapor deposition (LP-MOCVD). As growth temperature of initial AlN buffer increased, the full-width at half-maximum (FWHM) of the AlGaN (0 0 2) rocking curves decreased from 942 to 637 arcsec. Meanwhile, vacuum ultraviolet (VUV) photoluminescence (PL) spectroscopy showed that band edge exciton transition was greatly intensified, while deep level radiative recombination especially peaked at 304 nm was effectively suppressed. They were ascribed to the reducing of threading dislocations (TDs) in the AlGaN epilayers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 307, Issue 2, 15 September 2007, Pages 289–293
نویسندگان
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