PU Yong, ZHAO Cong, JING Xiao-long etc. Synthesis and Luminescence Properties of CaGd<sub>2</sub>(MoO<sub>4</sub>)<sub>4</sub>:Eu<sup>3+</sup>,Bi<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2018,39(8): 1045-1050
PU Yong, ZHAO Cong, JING Xiao-long etc. Synthesis and Luminescence Properties of CaGd<sub>2</sub>(MoO<sub>4</sub>)<sub>4</sub>:Eu<sup>3+</sup>,Bi<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2018,39(8): 1045-1050 DOI: 10.3788/fgxb20183908.1045.
Synthesis and Luminescence Properties of CaGd2(MoO4)4:Eu3+,Bi3+ Red Phosphors
=0-0.04) red phosphors were synthesized by a hydrothermal method. The crystal structure
microstructure and luminescent properties of the samples were studied by the use of XRD
SEM and FL spectrophotometer
respectively. The results reveal that the powders with the doping mole frsction of 15% Eu
3+
and 1% Bi
3+
hold the structure of body-centered quartet scheelite which belongs to the space groups of I4
1
/
a
(88). The particles of the sample are relatively uniform and the grain size is 3 to 5 m. The excitation spectra of the samples are made up of a wide excitation band between 200-350 nm and excitation peaks between 350-500 nm. The strongest excitation peak locates at 396 nm
which indicates the sample can be effectively excited by near-UV light. The strongest emission peak locates at 617 nm corresponding to the
5
D
0
7
F
2
transition of Eu
3+
. The concentration quenching phenomenon of Eu
3+
is not found in the present study. The dope of Bi
3+
can sensitize Eu
3+
to significantly improve the red emission intensity and the color purity of the sample. The best doping mole fraction of Bi
3+
is 1%.
关键词
Keywords
references
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