کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9778008 | 1510568 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aluminum effect on photoluminescence properties of sol-gel-derived Eu3+-activated silicate glasses
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Aluminum effect on photoluminescence properties of sol-gel-derived Eu3+-activated silicate glasses Aluminum effect on photoluminescence properties of sol-gel-derived Eu3+-activated silicate glasses](/preview/png/9778008.png)
چکیده انگلیسی
Eu2O3-Al2O3-SiO2 monolithic xerogels doped with 2000 ppm Eu/Si and 5000 ppm Eu/Si, were prepared with different Al/Eu molar ratios: (a) 0, (b) 0.25, (c) 0.5, (d) 0.75, (e) 1, (f) 3, (g) 6, (h) 10, and (i) 15. The samples were investigated by photoluminescence spectroscopy. When we compare the spectra of the Al3+-co-doped xerogels with those of the samples without aluminum, several significant differences of the spectroscopic features appear: (i) the 5D0 â 7F0 transition exhibits a blue shift; (ii) the emission bands broaden; (iii) the relative amplitude among the different transitions changes as well as (iv) the splittings of the Stark components of the 5D0 â 7FJ transitions, and (v) the 5D0 level decay curves present a stretched exponential like profile. The results are discussed with the aim of assessing the effect of the Al/Eu molar ratio on the structural and spectroscopic properties of Eu2O3-Al2O3-SiO2 xerogels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 21â23, 15 July 2005, Pages 1754-1758
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 21â23, 15 July 2005, Pages 1754-1758
نویسندگان
G. Alombert-Goget, N. Gaumer, J. Obriot, A. Rammal, S. Chaussedent, A. Monteil, H. Portales, A. Chiasera, M. Ferrari,