کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7920368 | 1511490 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of Ce3+ concentration and heat treatment on the luminescence efficiency of YAG phosphor
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The effect of Ce3+ concentration and heat treatment on the luminescence efficiency of YAG phosphor The effect of Ce3+ concentration and heat treatment on the luminescence efficiency of YAG phosphor](/preview/png/7920368.png)
چکیده انگلیسی
Y3Al5O12 (YAG) phosphor powders doped with Ce3+ at different concentrations (YAG:xCe, xâ¯=â¯0.02, 0.04, 0.06, 0.08, 0.1â¯wt%) were synthesized by the solid-state reaction method with the addition of BaF2 flux. The effects of cerium concentration and heat treatment on the luminescence efficiency of the YAG:Ce3+ phosphor were investigated. The introduction of Ce3+ ions leads to an increase in luminescent intensity of the YAG phosphor at 560â¯nm. The band at 530â¯nm is attributed to Ce3+ ions (optical transitions from the 4f-5d excited state). We assumed that such an increase in the luminescent intensity is due to the ability of Ce3+ to act as a luminescence sensitizer of intrinsic defects in YAG phosphor. The analysis of luminescence decay kinetics in the investigated samples has shown that the decay time in all samples does not differ significantly and equals Ïâ¯ââ¯60â¯Â±â¯3â¯ns. We showed experimentally that increasing the luminescence intensity has an effect observed with relatively low temperature treatment (Tâ¯=â¯400â¯K). The nature of possible luminescence centers and the effect of low heat treatment on the luminescence properties of the powders are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 116, May 2018, Pages 1-6
Journal: Journal of Physics and Chemistry of Solids - Volume 116, May 2018, Pages 1-6
نویسندگان
Damir Valiev, Tao Han, Vitaly Vaganov, Sergey Stepanov,