کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5442585 | 1510764 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Pr3+ -doped YPO4 nanophosphors prepared by simple sol gel method with different pH values (2, 4, 7 and 11) were obtained. The nanopowders samples were characterized by X-ray diffraction (XRD), room temperature steady and time resolved photoluminescence spectroscopy. The thorough study of pH influence on particle's structure and luminescence of YPO4: 1Â at. Pr3+ is presented. It was found that the grain size of samples increases with increases in pH value and obtained particles crystallize in a tetragonal phase with xenotime structure. Under 4f5d excitation (230Â nm), all emission spectra show the inter-configurational 4f2â4f5d and under 3P2 excitation (449Â nm), only the intra-configurational 1D2â3H4 red emission transition between 580Â nm and 620Â nm are observed. The highest luminescent intensity was obtained for samples prepared at pHÂ =Â 4. Furthermore, it was found that the pH of solution has no effect of 1D2 lifetime.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 70, August 2017, Pages 138-143
Journal: Optical Materials - Volume 70, August 2017, Pages 138-143
نویسندگان
B. Kahouadji, L. Guerbous, A. Boukerika, Slobodan D. DoliÄ, Dragana J. JovanoviÄ, Miroslav D. DramiÄanin,