کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5402661 1392739 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decay kinetics of the defect-based visible luminescence in ZnO
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Decay kinetics of the defect-based visible luminescence in ZnO
چکیده انگلیسی
Photoluminescence spectra and decays under pulsed N2 (337 nm) laser excitation were measured for hydrothermally grown bulk and liquid-phase epitaxy (LPE)-grown film ZnO samples within 9-300 K. Temperature dependence of integrated spectra over the exciton and visible spectral regions was evaluated using a model involving standard energy barrier processes. Decay curves measured within a broad time window (10 ns-1 ms) and with extreme signal/background ratio (five orders of magnitude) point to complex decay mechanism in which the exponential and inverse power-law processes can coexist. There is no straightforward interconnection between the observed temperature dependence of integrated visible photoluminescence intensity and its decay shape over the 9-300 K temperature interval.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 129, Issue 12, December 2009, Pages 1564-1567
نویسندگان
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