WU Yi-bing, SUN Zhuo, RUAN Kai-bin etc. Structural and Optical Properties of Ca<sub>0.88</sub>TiO<sub>3</sub>:0.12Eu<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 932-938
WU Yi-bing, SUN Zhuo, RUAN Kai-bin etc. Structural and Optical Properties of Ca<sub>0.88</sub>TiO<sub>3</sub>:0.12Eu<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 932-938 DOI: 10.3788/fgxb20143508.0932.
Structural and Optical Properties of Ca0.88TiO3:0.12Eu3+ Red Phosphors
and their structure and morphology were studied. XRD results show that CTE phosphors sintered at different temperature exhibit orthorhombic structure. The average grain size increases with the increase of sintering temperature
and their crystallization sintered at 1 300℃ is the best
which is consistent with the SEM results. CTE phosphors can be efficiently excited by near-ultraviolet light of 398 nm
and emit intensive red light with peaks around 594 nm and 616 nm corresponding to the transition
5
D
0
7
F
1
and
5
D
0
7
F
2
of Eu
3+
. The peak around 616 nm is stronger than that of 594 nm
showing that Eu
3+
ions site at lattice without the center of inversion symmetry. The emission intensity of CTE phosphor increases with the sintering temperature
and is the highest when the sintering temperature is 1 300℃ due to higher crystallinity. Furthermore
CTE phosphors have very good thermal stability and high color purity
implying the potential to be a promising red phosphor in white light emitting diodes.
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references
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