کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625597 | 989632 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, structural and luminescence properties of near white light emitting Dy3+-doped Y2CaZnO5 nanophosphor for solid state lighting
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Novel near white light emitting Y2CaZnO5 (YCZ) nanocrystalline powders doped with Dy3+ ions were synthesized via the citrate gel combustion method. The structure of the compound is found to be triclinic with a particle size in the range of 20-30Â nm. Luminescence properties have been characterized using photoluminescence (PL), excitation spectra and decay time measurements. The PL spectra have shown a broad blue band due to 4F9/2â6H15/2 transition and sharp yellow band corresponding to 4F9/2â6H13/2 transition of Dy3+ ions. From the concentration dependent PL studies, the optimum concentration of Dy3+ ions in YCZ is found to be 1.0Â mol%, where intense near white light emission was observed. The Dy3+:YCZ nanophosphor has shown relatively better white color properties than the reported Dy3+:Y2O3 nanophosphor. The yellow to blue intensity ratios, CIE chromaticity coordinates and correlated color temperature studies have shown the possibility of using this compound for white light emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 7, September 2013, Pages 7523-7529
Journal: Ceramics International - Volume 39, Issue 7, September 2013, Pages 7523-7529
نویسندگان
R. Rajeswari, C.K. Jayasankar, D. Ramachari, S. Surendra Babu,