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http://dx.doi.org/10.7742/jksr.2019.13.4.645

Luminescence Properties of Europium-doped NaSr(PO3)3 Phosphor  

Yoon, Changyong (Department of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer center)
Park, Cheolwoo (Department of Radiological Technology, Dong-Eui Institute of Technology)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.4, 2019 , pp. 645-652 More about this Journal
Abstract
Phosphor with phosphorus doped with rare earth ions was investigated by searching Sr and Eu phosphors suitable for substitution of Eu ions with similar ionic radius to polyphosphate host. The $NaSr(PO_3)_3$ phosphor was synthesized by the solid state method and the $NaSr(PO_3)_3:Eu^{2+}$ phosphor was prepared by the carbon thermal reduction method. Both of the phosphors were identified by X - ray diffraction. The excitation and emission spectra of $NaSr(PO_3)_3:Eu^{3+}$ increased fluorescence intensity and intensity quenching with increasing $Eu^{3+}$ concentration. The higher the $Eu^{3+}$ concentration in the emission spectrum, the higher the local symmetry of $Eu^{3+}$ environment. The mechanism of concentration quenching, in which fluorescence decreases due to the energy transfer between $Eu^{2+}$ ions with the closest critical distance between $Eu^{2+}$ ions with increasing $Eu^{2+}$ ion concentration, was confirmed in the emission spectrum of $NaSr(PO_3)_3:Eu^{2+}$ concentration. It is possible to change the fluorescent region through the post-processing of single rare earth ion added phosphors, and it is possible to change the fluorescence by applying the energy transfer and concentration quenching mechanism according to the local symmetry of $Eu^{3+}$ will be used for high phosphor development.
Keywords
Luminescence; X-ray diffraction; $NaSr(PO_3)_3$; Europium;
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Times Cited By KSCI : 2  (Citation Analysis)
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