期刊
JOURNAL OF LUMINESCENCE
卷 216, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2019.116720
关键词
Crystal structure; Photoluminescence; Multi-colour phosphor; Energy-transfer
类别
资金
- National Natural Science Foundation of China [21201056]
- Fundamental Research Funds for the Universities of Henan Province, China [NSFRF170301]
- Natural Science Foundation of Henan Province, China [182300410277]
- Henan Postdoctoral Foundation, China [201717]
- Science and Technology Research Project of Henan Province, China [172102310678]
- Key research project of Henan Province Office of Education, China [17A150013]
For the first time, rare-earth phosphate compound Cs4PbTb2(PO3)(12) was prepared using molten salt method and structurally characterized by single-crystal X-ray diffraction (XRD). Its structure features a three-dimensional (3D) open framework constructed by P4O12 cyclotetraphosphate groups and (Pb vertical bar Tb)O-8 polyhedra, with large holes filling with Cs+ ions. The P4O12 groups in this structure are isolated and each P4O12 is surrounded by four (Pb vertical bar Tb)O-8 polyhedra by sharing terminal O atoms. Furthermore, the powder XRD, infrared (IR) spectrum, Ultraviolet-visible (UV-Vis) spectroscopy and photoluminescence (PL) properties for title compound were studied. Under near-UV excitation (378 nm), the emission colour turns from green through yellow to pure red by simply adjusting the Eu3+ concentration due to the efficient Tb3+-> Zu(3+ )energy transfer mechanism.
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