Fluorescence and preparation of Sr2(P2O7):Ce,Tb phosphate by co-precipitation method
The micron-sized Sr2(P2OT):Ce,Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-pre-cipitates of (NH4)2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were inves...
Saved in:
Published in | 稀有金属:英文版 Vol. 32; no. 4; pp. 420 - 424 |
---|---|
Main Author | |
Format | Journal Article |
Language | English |
Published |
2013
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The micron-sized Sr2(P2OT):Ce,Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-pre-cipitates of (NH4)2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were investigated by X-ray diffraction, scanning electron microscope, trans-mission electron microscope, and fluorescence spectrum. The results show that the product of precursor annealed at 1,100 ℃ is Sr2(P2O7):Ce,Tb, which belongs to ortho-rhombic phase. The powder is spherical and the size dis-tribution is in micron grade. The sample with the molar ratio of Sr/Tb/Ce of 100.0:0.4:0.6 shows the best fluores-cence effect annealed at 1,100 ℃ for 3 h. The phosphors produce green fluorescence by being excitated with ultra-violet radiation of 254 nm wavelength, and the main emission peak is at 547 nm. The Sr2(P2O7):Ce,Tb phos-phors synthesized by co-precipitation method of precursors at ambient temperature is a kind of efficient green-emitting phosphors. |
---|---|
Bibliography: | The micron-sized Sr2(P2OT):Ce,Tb green phosphors were prepared by being annealed at different temperatures with its precursors synthesized by co-pre-cipitates of (NH4)2HPO4 at ambient temperature. The phase structure, grain size, surface morphology, and luminescent properties of phosphors were investigated by X-ray diffraction, scanning electron microscope, trans-mission electron microscope, and fluorescence spectrum. The results show that the product of precursor annealed at 1,100 ℃ is Sr2(P2O7):Ce,Tb, which belongs to ortho-rhombic phase. The powder is spherical and the size dis-tribution is in micron grade. The sample with the molar ratio of Sr/Tb/Ce of 100.0:0.4:0.6 shows the best fluores-cence effect annealed at 1,100 ℃ for 3 h. The phosphors produce green fluorescence by being excitated with ultra-violet radiation of 254 nm wavelength, and the main emission peak is at 547 nm. The Sr2(P2O7):Ce,Tb phos-phors synthesized by co-precipitation method of precursors at ambient temperature is a kind of efficient green-emitting phosphors. Phosphors; Co-precipitation method; Rareearth phosphate; Phosphorescence Cheng-Guo Ma, Wei Zheng, Li-Guo Jin, Li-Min Dong(School of Material Science & Engineering, Harbin University of Science and Technology, Harbin 150040, China) 11-2112/TF |
ISSN: | 1001-0521 1867-7185 |