A novel orange-red Sr9Ga(PO4)7: Sm3+ phosphors for white light emitting diodes

被引：5
作者：
Ma, Xiaoqin [1 ,2 ,3 ]
Sun, Shihao [1 ,2 ,3 ]
Ma, Jianbin [4 ]
机构：
[1] Qinghai Normal Univ, Xining 810016, Qinghai, Peoples R China
[2] Peoples Govt Qinghai Prov, Acad Plateau Sci & Sustainabil, Qinghai, Peoples R China
[3] Beijing Normal Univ, Beijing, Peoples R China
[4] Qinghai Normal Univ, Sch Life Sci, Xining 810016, Qinghai, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 11期
关键词：
red-orange phosphors; luminescence properties; thermo stability; concentration quench; EFFICIENT ENERGY-TRANSFER; LUMINESCENCE PROPERTIES; PHOTOLUMINESCENCE PROPERTIES; CRYSTAL-STRUCTURE; EMISSION; EU3+; CE3+; TB3+;
D O I：
10.1088/2053-1591/ab47c6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Novel red-orange emitting phosphors Sr9Ga(PO4)(7):xSm(3+) were synthesized by solid state reaction for the first time. Their crystal structure, photoluminescence, thermo stability and lifetime were studied in detail. Results of XRD analysis suggests that Sm3+ is doped on the host lattice without any changes on crystal texture and photoluminescence emission spectra mainly consists of three emission bands attributed to transitions of (4)G(5/2) -> H-6(J) (J = 5/2, 7/2 and 9/2). Besides, the Dexter theory and lifetime were considered carefully to explain the concentration quench performance of phosphors and to reveal the mechanism for Sm3+ energy transfer. Especially, at 150 degrees C the phosphor still kept high energy efficiency relative to 97.34% of the best. Additionally, the thermal activation energy was determined to be 0.411 eV as calculated from the Arrhenius equation. All the results showed the potential application of these red-orange phosphors in n-UV white light-emitting diodes.
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页数：7
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