کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5399968 1505902 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and luminescence properties of novel Sr3Gd(PO4)3:Dy3+ phosphor
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Synthesis and luminescence properties of novel Sr3Gd(PO4)3:Dy3+ phosphor
چکیده انگلیسی
Sr3(Gd1−xDyx)(PO4)3 phosphors for white light-emitting diodes (w-LEDs) were prepared by the conventional solid-state reaction. X-ray diffraction (XRD) and photoluminescence spectra were utilized to characterize the structure and luminescence properties of the as-synthesized phosphors. Luminescence properties shows that the phosphor can be efficiently excited by the ultraviolet visible light in the region from 300 to 450 nm, and it exhibits blue (483 nm) and yellow (575 nm) emission corresponding to 4F9/2→6H15/2 transition and 4F9/2→6H13/2 transition, respectively. It has been found that concentration quenching occurs via dipole-dipole interaction according to Dexter׳s theory. The temperature dependence of photoluminescence properties is investigated from 25 to 250 °C and the prepared Sr3Gd(PO4)3:Dy3+ phosphors show good thermal quenching properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 158, February 2015, Pages 301-305
نویسندگان
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