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http://dx.doi.org/10.6111/JKCGCT.2017.27.1.042

Synthesis of long afterglow phosphor SrAl2O4 : Eu+2,Dy+3 by skull melting method  

Ryu, Chang-Min (Department of Gem and Precious Metals, Dongshin University)
Seok, Jeong-Won (Department of Gem and Precious Metals, Dongshin University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.27, no.1, 2017 , pp. 42-46 More about this Journal
Abstract
$SrAl_2O_4$ : $Eu^{2+}$,$Dy^{3+}$ phosphorescent phosphors were synthesized by skull melting method. The molar ratio of oxides in the phosphors synthesized by the skull melting technique was $SrCO_3$ : $Al(OH)_3$ : $Eu_2O_3$ : $Dy_2O_3$= 1 : 2 : 0.015 : 0.02. Crystal structure and surface morphology were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Optical properties of the synthesized $SrAl_2O_4$ : $Eu^{2+}$,$Dy^{3+}$ were measured by photoluminescence (PL) spectrometer for in-depth study on the excitation, emission and afterglow properties. From the PL measurements, it was found that excitation occurred in the wavelength range from 300 to 420 nm with peak position at 360 nm. The emission spectrum showed a broad curve in the wavelength from 450 to 600 nm with peak position at 530 nm. $SrAl_2O_4$ : $Eu^{2+}$,$Dy^{3+}$ phosphors exhibited afterglow properties with emission that lasted for a long period.
Keywords
Skull melting method; $SrAl_2O_4$ : $Eu^{2+}$,$Dy^{3+}$; Long phosphorescent phosphors; Excitation; Emission;
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