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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors
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: 1 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 (230 nm), all emission spectra show the inter-configurational 4f2→4f5d and under 3P2 excitation (449 nm), only the intra-configurational 1D2→3H4 red emission transition between 580 nm and 620 nm are observed. The highest luminescent intensity was obtained for samples prepared at pH = 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
نویسندگان
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