Lattices selective occupation, optical spectra regulation, and photoluminescence properties of Eu2+ activated Ca9La(PO4)7 phosphor

被引：11
作者：
Xu, Mingxue [1 ]
Fan, Chenli [1 ]
Yang, Chen [1 ]
Song, Kaixin [1 ]
Hussain, Fayaz [2 ]
Sheng, Weiqing [1 ]
Wu, Jun [1 ]
Wang, Huanping [3 ]
Su, Weitao [4 ]
Huang, Qingming [5 ]
Sun, Shikuan [6 ]
机构：
[1] Hangzhou Dianzi Univ, Coll Elect Informat, Hangzhou 310018, Peoples R China
[2] NED Univ Engn & Technol, Dept Mat Engn, Main Univ Rd, Karachi 75279, Pakistan
[3] China Jiliang Univ, Coll Mat Sci & Engn, Hangzhou 310018, Peoples R China
[4] Hangzhou Dianzi Univ, Coll Sci, Hangzhou 310018, Peoples R China
[5] Fuzhou Univ, Testing Ctr, Fuzhou 350116, Peoples R China
[6] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2021年 / 237卷
基金：
中国国家自然科学基金;
关键词：
Apatite; Phosphor; Site occupation; Photoluminescence; ENERGY-TRANSFER; BOND-ENERGY; LUMINESCENCE; TEMPERATURE; EFFICIENT; CE3+; BAND; NA; LI;
D O I：
10.1016/j.jlumin.2021.118197
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Rare earth ions doping multiple activation lattice sites is an important strategy to control luminescent properties of luminescent materials. In the work, Eu2+ doped Ca9La(PO4)7 phosphor was fabricated to study with the dependence of lattice structure, site occupation on the luminescence properties. Rietveld refinement results of XRD shows that the phosphors are pure phases with the same crystal structure of whitlockite 8-Ca3(PO4)2. Further, Eu2+ ions at four lattice sites are distinguished by comparing the change of bond energy, preferentially occupies the smaller energy variation sites of Eu(3)[CN = 8], Eu(4)[CN = 6](Eu luminescent center at La site), Eu (1)[CN = 7], Eu(2)[CN = 8]. The activation energy of the emission band at 418 nm is calculated at about 0.2872eV, and the activation energy of the emission band at 512 nm about 0.2022eV.
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页数：7
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