کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10633610 | 993046 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and luminescence properties of ZrO2:Yb3+-Er3+ nanophosphor
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The effects of the Yb3+ concentration on the structural and luminescence properties of ZrO2:Yb3+-Er3+ nanoparticles prepared by sol-gel process are reported. The evolution of the crystalline structure and crystallite size as a function of Yb3+ concentration were investigated by XRD and TEM. The experimental results show that it is possible to obtain tetragonal and cubic structures by codoping the system 1 mol % Er2O3-ZrO2 with 2 and 8 mol % of Yb2O3, respectively. Upconversion luminescence at 656 nm (red), 544 nm, 525 nm (green) and 410 nm (blue) all characteristic of Er3+ ion, was observed when the ZrO2:Yb3+-Er3+ nanophosphors were excited at 968 nm, as well as the cooperative emission of Yb3+ (525 nm). The red and blue upconversion emission is enhanced with the increment of Yb3+ ion concentration, while the cooperative emission disappears in the presence of Er3+. The nature of this behavior is discussed taking into account the nonradiative energy transfer of one cooperative photon and cross-relaxation process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 27, Issue 7, April 2005, Pages 1295-1300
Journal: Optical Materials - Volume 27, Issue 7, April 2005, Pages 1295-1300
نویسندگان
P. Salas, C. Angeles-Chávez, J.A. Montoya, E. De la Rosa, L.A. Diaz-Torres, H. Desirena, A. MartıÌnez, M.A. Romero-Romo, J. Morales,