Investigation on the upconversion luminescence in Ho3+/Yb3+ co-doped Ba3Sc4O9 phosphor

被引:41
作者
Liu, Shuifu [1 ]
Liu, Songbin [1 ]
Ming, Hong [1 ]
Hou, Dejian [1 ]
You, Weixiong [3 ]
Ye, Xinyu [1 ,2 ]
机构
[1] Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Peoples R China
[2] Natl Engn Res Ctr Ion Rare Earth, Ganzhou 341000, Peoples R China
[3] Jiangxi Univ Sci & Technol, Sch Mat Sci & Engn, Ganzhou 341000, Peoples R China
关键词
Upconversion; Phosphor; Ba3Sc4O9; Energy transfer; ENERGY-TRANSFER; GREEN; NANOCRYSTALS; EMISSION; HO3+; PHOTOLUMINESCENCE; TEMPERATURE; SCANDATE; INTENSE; SIZE;
D O I
10.1016/j.materresbull.2017.10.025
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of Ba3Sc4O5:Ho3+/Yb3+ phosphors were synthesized by a high-temperature solid-state reaction method. The phase purity and upconversion luminescence were characterized by X-ray diffraction and photoluminescence spectroscopy. The sintering temperature and doping concentrations were optimized to obtain the strongest emission intensity. Under 980 nm laser diode excitation, the green (545 nm, F-5(4)/S-5(2) -> I-5(8)) and red (665 nm, F-5(5) -> I-5(8)) emissions were observed. The cross-relaxation and back-energy-transfer processes play an important role to adjust the emission intensity ratio of Green/Red at different dopant concentrations. Based on the energy level diagrams, the energy transfer mechanisms are investigated in detail according to the analysis of pump power dependence and luminescence decay curves. The upconversion luminescence properties of the phosphor were evaluated and the results show good color monochromaticity and relatively high upconversion luminescence intensity. The Ba3Sc4O5:Ho3+/Yb3+ can be a good candidate for green upconversion material in display fields and fluorescent labeling.
引用
收藏
页码:187 / 193
页数:7
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