کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398146 | 1505881 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Relationship between thermal quenching of Eu2+ luminescence and cation ordering in (Ba1âxSrx)2SiO4:Eu phosphors
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Relationship between thermal quenching of Eu2+ luminescence and cation ordering in (Ba1âxSrx)2SiO4:Eu phosphors Relationship between thermal quenching of Eu2+ luminescence and cation ordering in (Ba1âxSrx)2SiO4:Eu phosphors](/preview/png/5398146.png)
چکیده انگلیسی
The thermal quenching property of phosphors has been proven to have a strong impact on the application of them. In this paper, a series of (Ba1âxSrx)2SiO4:Eu2+ compounds have been synthesized via conventional high-temperature solid-state reaction. Based on the Rietveld fitting analysis of the X-ray diffraction data, the preferential occupancy behavior of Sr2+/Ba2+ ions is verified. We adopt the cation ordering to characterize this preferential occupancy and find that the degree of cation ordering reaches its maximum at x=0.5 and decreases as x deviates from 0.5. The photoluminescence measurements show that the intermediate composition (x=0.5) exhibits the best luminescence thermal stability with T1/2 over 200 °C. The composition dependence of thermal quenching temperature is well similar to the composition dependence of the degree of cation ordering, indicating that the thermal quenching property of (Ba1âxSrx)2SiO4:Eu2+ is positively related to the cation ordering. This work provides a deeper understanding between thermal quenching properties and crystal structures of phosphors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 180, December 2016, Pages 163-168
Journal: Journal of Luminescence - Volume 180, December 2016, Pages 163-168
نویسندگان
Lizhu He, Zhen Song, Qianchuan Xiang, Zhiguo Xia, Quanlin Liu,