کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886215 | 1509785 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoluminescence of terbium doped oxyfluoro-titania-phosphate glasses for green light devices
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Terbium (Tb3+) doped oxyfluoro-titania-phosphate glasses of chemical composition (in mol%), (60 - x) P2O5 - 15 BaF2 - 20 CaF2 - 5 TiO2 - x Tb4O7, xâ¯=â¯0.05, 0.1 and 0.1 were fabricated by usual melt-quenching technique. Photoluminescence (PL) properties of the samples have been investigated by excitation, emission and decay profiles. Upon excitation at 377â¯nm, the PL spectra exhibit an intense band at 541â¯nm which corresponds to the 5D4 â 7F5 transition. The intensity ratio of green-to-blue (IG/IB) was found to be 9.2 for 0.1â¯mol% of Tb3+-doped glass. High-energy absorption bands were not resolved in the absorption spectrum but disclosed in the photoluminescence excitation spectrum. Decay curves were unveiled non-exponential and mono-exponential behaviours for the 5D3 and 5D4 levels, respectively. Lifetime of the 5D3 and 5D4 levels was decreased up to 0.1â¯mol%, and thereafter it was increased with the increase of Tb3+ ion concentration upon 377â¯nm excitation. The CIE chromaticity coordinates were supported that the green emission was predominant in Tb3+-doped oxyfluoro-titania-phosphate glasses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15304-15309
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15304-15309
نویسندگان
G. Neelima, Venkata Krishnaiah Kummara, C.S. Dwaraka Viswanath, K. Tyagarajan, N. Ravi, T. Jayachandra Prasad,