Influence of. γ-radiation on photoluminescence properties of YPO4:Eu3+, Ce3+ and YPO4:Dy3+,Ce3+ phosphors

被引：4
作者：
Gurugubelli, Sudheer [1 ]
Dadhich, Anima S. [1 ]
Saha, Abhijit [2 ]
Mukkamala, Saratchandra Babu [1 ]
机构：
[1] GITAM Univ, Dept Chem, Visakhapatnam 530045, Andhra Pradesh, India
[2] UGC DAE Consortium Sci Res, Kolkata 700098, WB, India
来源：
RADIATION EFFECTS AND DEFECTS IN SOLIDS | 2015年 / 170卷 / 10期
关键词：
yttrium phosphate; rare-earth ions; hydrothermal synthesis; photoluminescence; -irradiation; SINGLE-MOLECULE MAGNET; OPTICAL-PROPERTIES; LUMINESCENCE; NANOPARTICLES; ION; THERMOLUMINESCENCE; RELAXATION;
D O I：
10.1080/10420150.2015.1114620
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Hexagonal YPO4 phosphors doped with Eu3+/Dy3+ and co-doped with Ce3+ were synthesized by a hydrothermal route assisted using lauric acid as a capping agent. The prepared phosphors were characterized by transmission electron microscopy, infrared spectroscopy, powder X-ray diffraction and photoluminescence spectra. YPO4: Eu3+ gives two red emission peaks at 587 and 610nm corresponding to (D0F1)-D-5-F-7 and (D0F2)-D-5-F-7 transitions, respectively. YPO4: Dy3+ exhibits two emission peaks at 485nm (blue) and 575nm (yellow) corresponding to (F9/2H15/2)-F-4-H-6 and (F9/2H13/2)-F-4-H-6 transitions, respectively. Ce3+ ions enhanced the emission intensity as a co-dopant in both phosphors. Moreover, the effect of -radiation in the dose range 5-300kGy on the photoluminescence behaviour of YPO4:Eu3+,Ce3+ and YPO4:Dy3+,Ce3+ was also investigated. Quenching of emission intensity, after irradiation at 5 and 300kGy, was observed in both the phosphors due to loss of excess energy through a non-radiative relaxation process.
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页码：812 / 820
页数：9
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