کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7906740 | 1510754 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Composition effect in luminescence properties of Y(NbxTa1-x)O4 mixed crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The luminescence properties of Y(NbxTa1-x)O4 mixed crystals were studied. Local structure modifications arise due to the inhomogeneous distribution of the substitutional ions in the mixed crystal and can be traced using the luminescence spectroscopy. In particular, it is shown that the intensity of exciton emission under interband VUV excitation increases for intermediate values of x with the maximum at xâ¯=â¯0.4 relatively to the intensity observed in the constituents of the mixed crystals - YTaO4 and YNbO4. From the luminescence excitation spectra it follows that the probability of exciton creation from the separated e-h pairs increases for intermediate values of x as well. Using numerical simulation it is shown that the effect is connected with the variation of the thermalization length of hot electrons and holes, which is minimal at xâ¯=â¯0.4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 80, June 2018, Pages 247-252
Journal: Optical Materials - Volume 80, June 2018, Pages 247-252
نویسندگان
D. Spassky, A. Vasil'ev, S. Vielhauer, O. Sidletskiy, O. Voloshyna, A. Belsky,