کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402178 | 1392728 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Luminescence of Ce3+ and Pr3+ doped Sr2Mg(BO3)2 under VUV-UV and X-ray excitation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Luminescence of Ce3+ and Pr3+ doped Sr2Mg(BO3)2 under VUV-UV and X-ray excitation Luminescence of Ce3+ and Pr3+ doped Sr2Mg(BO3)2 under VUV-UV and X-ray excitation](/preview/png/5402178.png)
چکیده انگلیسی
This report presents the luminescence properties of Ce3+ and Pr3+ activated Sr2Mg(BO3)2 under VUV-UV and X-ray excitation. The five excitation bands of crystal field split 5d states are observed at about 46 729, 44 643, 41 667, 38 314 and 29 762 cmâ1 (i.e. 214, 224, 240, 261 and 336 nm) for Ce3+ in the host lattice. The doublet Ce3+ 5dâ4f emission bands were found at about 25 840 and 24 096 cmâ1 (387 and 415 nm). The influence of doping concentration and temperature on the emission characteristics and the decay time of Ce3+ in Sr2Mg(BO3)2 were investigated. For Pr3+ doped samples, the lowest 5d excitation band was observed at about 42017 cmâ1 (238 nm), a dominant band at around 35714 cmâ1 (280 nm) and two shoulder bands were seen in the emission spectra. The excitation and emission spectra of Ce3+ and Pr3+ were compared and discussed. The X-ray excited luminescence studies show that the light yields are â¼3200±230 and â¼1400±100 photons/MeV of absorbed X-ray energy for the samples Sr1.86Ce0.07Na0.07Mg(BO3)2 and Sr1.82Pr0.09Na0.09Mg(BO3)2 at RT, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 131, Issue 2, February 2011, Pages 194-198
Journal: Journal of Luminescence - Volume 131, Issue 2, February 2011, Pages 194-198
نویسندگان
Hongbin Liang, Huihong Lin, Guobin Zhang, Pieter Dorenbos, Qiang Su,