کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8147175 | 1524142 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Greenish blue luminescence in NaCd(1âx) SO4F: XEu2+ halosulphate phosphor for solid state lightening devices
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک اتمی و مولکولی و اپتیک
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چکیده انگلیسی
A series of new greenish blue emitting halosulphate phosphors NaCd(1âx)SO4F: xEu2+ (xâ¯=â¯1,3,5,7 mol%) was synthesized by re-crystallization method and its phase formation was confirmed by using the x-ray powder diffraction (XRD) technique. Fourier transform infrared spectroscopy (FTIR) characterizations and SEM analysis have also been investigated to explore the existence of various stretching bands and study of particle morphology. The photoluminescence (PL) results showed that the phosphor was excited by ultraviolet (UV) light at the wavelength of 200-400â¯nm, and it exhibited bright greenish blue emission under 280â¯nm UV light. The emission spectrum showed that a single broad band centered at 500â¯nm, corresponding to the 4f65d1 â4f7 transition of Eu2+. The Eu2+ concentration dependent PL in NaCdSO4F:Eu2+ indicated that there was dipole-dipole interaction of Eu2+ ions. The critical transfer distance was around 15.51 Ã
. The NaCdSO4F:Eu2+ halosulphate phosphor under 280â¯nm excitation is very suitable for UV applications in solid state lightening devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: St. Petersburg Polytechnical University Journal: Physics and Mathematics - Volume 3, Issue 4, December 2017, Pages 339-343
Journal: St. Petersburg Polytechnical University Journal: Physics and Mathematics - Volume 3, Issue 4, December 2017, Pages 339-343
نویسندگان
S.T. Taide, N.B. Ingle, S.K. Omanwar,