Effects of argon sintering atmosphere on luminescence characteristics of Ca6BaP4O17:Sm3+ phosphors

被引:20
作者
Chiang, Chung-Hao [1 ]
Su, Hsiu-Hsien [1 ]
Fang, Ying-Chien [2 ]
Chu, Sheng-Yuan [1 ,3 ]
机构
[1] Natl Cheng Kung Univ, Dept Elect Engn, 1 Univ Rd, Tainan 70101, Taiwan
[2] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan
[3] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 70101, Taiwan
关键词
Sm3+ activator; Argon atmosphere; Charge compensator; Solid solubility; THERMAL-STABILITY; PHOTOLUMINESCENCE PROPERTIES; CHARGE COMPENSATION; CRYSTAL-GROWTH; SM3+; EMISSION;
D O I
10.1016/j.ceramint.2018.01.016
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this paper, Ca6BaP4O17:Sm3+ and Li+ co-doped Ca6BaP4O17:Sm3+ phosphors were synthesized in air and argon atmospheres using a solid-state reaction method. The phosphor morphologies and crystal structure were studied using scanning electron microscopy and X-ray diffraction, respectively. The emission and absorption characteristics were investigated using photoluminescence emission spectroscopy and diffuse reflectance spectroscopy. The surface states and composition of phosphor were investigated using X-ray photoelectron spectroscopy. The emission integrated intensities of the phosphors sintered in an argon atmosphere increased 3.5 fold than the ones sintered in air atmosphere, with Li+ ions becoming embedded in the lattice of the Ca6BaP4O17:Sm3+ phosphor. This occurs because there are fewer defect/oxygen vacancies and less of the secondary phase forms, leading to better Sm3+ emission. The results suggest that sintering a mixture of the raw materials of a phosphor in an argon atmosphere is a good approach for synthesizing Ca6BaP4O17:Sm3+ phosphor powders. The color purity and CIE values of an optimized phosphor sample sintered in an argon atmosphere with an Li+ ion compensator were calculated to be similar to 99.6% and (0.612,0.386) in the orange red region under 405nm excitation, respectively. Moreover, the solid solubility of Sm3+ ions in the Ca6BaP4O17 host can be enhanced by using an argon atmosphere in the synthesis process.
引用
收藏
页码:6278 / 6284
页数:7
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