کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1258324 971612 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescent properties and energy transfer mechanism from Tb3+ to Eu3+ in CaMoO4:Tb3+,Eu3+ phosphors
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Luminescent properties and energy transfer mechanism from Tb3+ to Eu3+ in CaMoO4:Tb3+,Eu3+ phosphors
چکیده انگلیسی

A series of CaMoO4:Tb3+,Eu3+ phosphors were prepared by the method of precipitation. The structure and morphology of the phosphors were characterized by the X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The photoluminescence properties of the prepared products were researched, and the energy transfer from Tb3+ to Eu3+ in CaMoO4 phosphors was studied. By adjusting the doping concentration of Eu3+ ions in CaMoO4:Tb3+,Eu3+ phosphors, the emitting color of the phosphors could be easily tuned from green to red. With Tb3+ doped in the phosphors, the red luminescence of Eu3+ by near UV excitation was significantly enhanced. The energy transfer efficiency, rate and average distance between Tb3+ and Eu3+ in CaMoO4:5%Tb3+,x%Eu3+ (mole percent) phosphors (x=0.3–10) were calculated. It was found that the interaction type between Tb3+ and Eu3+ was electric dipole-dipole interaction in the phosphors.

Graphical AbstractCIE chromaticity coordinates and dark field real shot of CaMoO4:5%Tb3+,x%Eu3+ phosphors (x=0, 0.3, 0.5, 1, 3, 5, 7 and 10) (the excitation wavelength is 274 nm)Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Rare Earths - Volume 34, Issue 3, March 2016, Pages 251–258
نویسندگان
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