کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400302 | 1505914 | 2014 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of orange-red-emitting Eu2+, Pr3+ codoped SrS long afterglow phosphor
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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: Synthesis of orange-red-emitting Eu2+, Pr3+ codoped SrS long afterglow phosphor Synthesis of orange-red-emitting Eu2+, Pr3+ codoped SrS long afterglow phosphor](/preview/png/5400302.png)
چکیده انگلیسی
We describe the synthesis and properties of an orange-red-emitting SrS:Eu2+,Pr3+ phosphor showing a long afterglow of greater than 1000 min under visible light. The SrS:Eu2+,Pr3+ phosphor was synthesized by reduction of SrSO4:Eu3+,Pr3+ formed by liquid phase reaction. The SrS:Eu2+,Pr3+ phosphor showed orange-red emission with a peak wavelength of 611 nm. The excitation band of the phosphor was in the range of visible light above 440 nm. The optimum reaction conditions were achieved under a reducing atmosphere at 1400 °C for 2 h. The optimum quantity of activator was obtained for Eu/Sr and Pr/Sr atomic ratios of 0.00002 and 0.0010, respectively. The afterglow time for the SrS:Eu2+,Pr3+ phosphor after irradiation for 5 min at 1000 lux under a D65 lamp was greater than 1000 min, which was 7 times longer than that obtained with a commercially available CaS afterglow phosphor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 146, February 2014, Pages 42-45
Journal: Journal of Luminescence - Volume 146, February 2014, Pages 42-45
نویسندگان
Yoshiyuki Kojima, Aoi Takahashi, Tetsuo Umegaki,