کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398502 | 1505888 | 2016 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic properties of K4SrSi3O9 doped with Sm3+
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Sm3+ doped K4SrSi3O9 red phosphor, was synthesized for the first time by the conventional solid state method. The X-ray powder diffraction confirmed that obtained phosphor was single phase. Excitation and emission spectra and decay curves were measured to characterize the luminescent properties of the obtained material. K4SrSi3O9:Sm3+ exhibits red-orange luminescence originating mainly from equally intense 4G5/2â6H7/2 (with its maximum at 598.5Â nm) and 4G5/2â6H9/2 (at 651Â nm) transitions. The luminescence is quenched in the samples doped above 2% of Sm3+ due to non-radiative energy transfer between Sm ions at different sites. The interaction between Sm3+ ions is dipole-quadrupole type and the critical radius for energy transfer was calculated from Inokuti-Hirayama model to be 15.0Â Ã
and 14.2Â Ã
for 300Â K and 77Â K respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 173, May 2016, Pages 38-43
Journal: Journal of Luminescence - Volume 173, May 2016, Pages 38-43
نویسندگان
B. Bondzior, D. StefaÅska, A. Kubiak, P.J. DereÅ,