کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1808675 1525169 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of Tb3+ concentration on the La2Sr3(BO3)4: X% Tb3+ polycrystalline nanophosphor
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effects of Tb3+ concentration on the La2Sr3(BO3)4: X% Tb3+ polycrystalline nanophosphor
چکیده انگلیسی
A new green phosphor, La2Sr3(BO3)4): x% Tb3+ was fabricated by solution-combustion method using urea as a fuel and ammonium nitrate as an oxidizer. The phosphor was characterised using Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC), Energy dispersive spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy (PL. The results exhibit that La2Sr3(BO3)4): x% Tb3+ phosphor has the strongest excitation at 209 nm with a full-width at half-maximum (FWHM) of 20 nm, and can emit bright green light at 545 nm under 209 nm excitation. The optimum concentration for Tb3+ in La2Sr3(BO3)4): x% Tb3+ is 0.033 mol%. The prominent green luminescence was due to the 5D4-7F5 transition of Tb3+ ion. Herein, the green phosphors are promising good candidates employed in tri-color lamps.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 480, 1 January 2016, Pages 163-168
نویسندگان
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