کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5439178 | 1398192 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Time-resolved photoluminescence studies in Eu-doped SiO2 - HfO2 - ZnO glass-ceramic waveguides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Fabrication of ZnO-HfO2 hybrid nanocrystals embedded 70 SiO2-(30âx) HfO2-xZnO (x=0, 2, 5, 7 and 10Â mol%) ternary glass-ceramic planar waveguides doped with 1Â mol% Eu-ions, by sol-gel process and dip-coating technique has been reported. The effect of varying ZnO concentration on the growth and structural evolution of ZnO-HfO2 hybrid nanocrystals were investigated using transmission electron microscopy and other spectroscopic tools. Time-resolved PL measurements were performed to estimate the PL emission lifetimes of Eu2+ and Eu3+, present in two different local environments in the ternary matrix, as a function of ZnO concentration. Eu3+ ions exhibit double exponential decay profile for the D05âF27 emission, while the decay curves of Eu2+ ions are single exponential. The variations in the PL emission decay profiles are used as a probe to investigate the changes in the local environments of the rare-earth ions in the glass-ceramic waveguides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 1, Part B, January 2017, Pages 1145-1149
Journal: Ceramics International - Volume 43, Issue 1, Part B, January 2017, Pages 1145-1149
نویسندگان
Subhabrata Ghosh, Sreeramulu Valligatla, Anna Lukowiak, Alessandro Chiasera, Maurizio Ferrari, B.N. Shivakiran Bhaktha,