کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1626432 1516442 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical co-precipitation synthesis and photoluminescence of LnPxV1 − xO4:Dy3+ (Ln = Gd, La) derived from assembling hybrid precursors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Chemical co-precipitation synthesis and photoluminescence of LnPxV1 − xO4:Dy3+ (Ln = Gd, La) derived from assembling hybrid precursors
چکیده انگلیسی

A novel synthesis technology was applied to obtain GdPxV1 − xO4:Dy3+ (x = 0.2, 0.3, 0.4, 0.5, 0.6, 0.7) and LaPxV1 − xO4:Dy3+ (x = 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8) phosphors for the first time. And the doping concentration of Dy3+ ions was 3 mol.% in the two systems. Besides this, GdVO4 and LaVO4 doped with different concentration of Dy3+ ions were also synthesized. The rare earth coordination polymers with salicylic acid were used as precursors and the polyethylene glycol (PEG) was used as dispersing media. By an in situ co-precipitation process, we obtained the hybrid precursors. Both XRD and SEM indicated that the particles present good crystalline state, whose crystalline grain sizes were in the range of around 0.5–1 μm. The optical properties of all the powder presented that the characteristic transitions of Dy3+ due to 4F9/2 → 6H15/2 (blue) and 4F9/2 → 6H13/2 (yellow) were detected. Besides this, in the system of GdPxV1 − xO4:Dy3+, the yellow-to-blue intensity ration (Y/B) depended on the value of P/V greatly, with the increasing of x value, the Y/B decreasing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 431, Issues 1–2, 4 April 2007, Pages 342–347
نویسندگان
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