کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7919956 | 1511485 | 2018 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoluminescence performance of Er/Yb co-doped NBT ceramics prepared via hydrothermal method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Er/Yb co-doped Na0.5Bi0.5TiO3 (Na0.5Bi0.5-x-yErxYbyTiO3, NBT-Er/Yb) ceramics were prepared via a hydrothermal method, in which the effects of different content of Er/Yb co-doping on the NBT ceramics were studied. XRD and SEM analysis proved that the hydrothermal synthesized NBT-Er/Yb precursor powders present rather pure rhombohedral perovskite structure and homogeneous cube-shape particles with slight distortion composed of nano-sized lamellars. Pure rhombohedral perovskite structure NBT-Er/Yb ceramics accompanied by high densification and homogenous microstructure morphology were synthesized using the high active nano-sized particles, where slight impurity appears when the Yb doping content is larger than 7â¯mol%. The NBT-Er/Yb ceramics present the strongest emission peak at 550â¯nm under the excitation of 488â¯nm light, corresponding to the 4S3/2â¯ââ¯4I15/2 electron transition, where the fluorescence intensity decreases rapidly with further increasing the Yb3+ doping content. Enhanced upconversion luminescence is induced by the Yb co-doping and the maximum intensity appears around 3-5â¯mol% Yb content in the NBT-Er/Yb ceramics under 800â¯nm light excitation, which emits strong yellowish green light centering around 542â¯nm, correlating with the electron transition from 4S3/2 to 4I15/2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 121, October 2018, Pages 228-235
Journal: Journal of Physics and Chemistry of Solids - Volume 121, October 2018, Pages 228-235
نویسندگان
Jing Shi, Jianjian Sun, Bijun Fang, Qingbo Du, Shuai Zhang, Jianning Ding,