Synthesis and luminescent properties of novel BaGd2O4:Eu3+ scintillating phosphor.
BaGd2-x O4:xEu(3+) and Ba1-y Gd1.79-2y Eu0.21 Na3y O4 phosphors were synthesized at 1300°C in air by conventional solid-state reaction method. Phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence excitation (PLE) spectra, photoluminescence (PL) spectra and thermoluminescence (TL) spectra. Optimal PL intensity for BaGd2-x O4 :xEu(3+) and Ba1-y Gd1.79-2y Eu0.21 Na3y O4 phosphors at 276 nm excitation were found to be x = 0.24 and y = 0.125, respectively. The PL intensity of Eu(3+) emission could only be enhanced by 1.3 times with incorporation of Na(+) into the BaGd2 O4 host. Enhanced luminescence was attributed to the flux effect of Na(+) ions. However, when BaGd2 O4:Eu(3+) phosphors were codoped with Na(+) ions, the induced defects confirmed by TL spectra impaired the emission intensity of Eu(3+) ions.
Department of Physics, Jinggangshan University, Ji'an, 343009, People's Republic of China or China. sxy5306@126.com
Xin-Yuan
XY
Sun
Wen-Feng
WF
Wang
Shou-Qiang
SQ
Sun
Liang-Wu
LW
Lin
De-Yi
DY
Li
Ling-Ping
LP
Zhou
D001464:Barium / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements
D049408:Luminescent Agents; D001464:Barium; D005063:Europium; D005682:Gadolinium