کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1617407 | 1005686 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation on temperature dependence of photoluminescence in Sr1.7Eu0.3MxCeO4.15+x/2 (M = Li+, Na+, K+, x = 0, 0.3) red phosphors
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
⺠For Li+-doing, Na+-doping or K+-doping, the different substitution mechanisms are proposed and confirmed. ⺠The Eu-O CT band shifts to longer wavelength by doping with monovalent ions, Li+, Na+, K+. ⺠We explain it via two factors, i.e., ionic charge and electronegativity value. We propose that the influencing of the former is larger than the latter. ⺠An obvious thermal quenching behaviors for all red emitting samples are observed, providing for a possible application of the materials in thermometry. ⺠The thermal quenching temperatures vary with the addition of monovalent ions, Li+, Na+, K+. ⺠We interpret it via the shift of the excited Eu-O charge transfer state, consisting of its energy and Îr. ⺠We put forward a possible way to change thermal quenching luminescence properties of fluorescence materials by adding appropriate impurity ions, which is important for their applications in luminescence or thermometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 509, Issue 11, 17 March 2011, Pages 4209-4213
Journal: Journal of Alloys and Compounds - Volume 509, Issue 11, 17 March 2011, Pages 4209-4213
نویسندگان
Lili Shi, Chengyu Li, Qiang Su,