期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 269, 期 -, 页码 125-131出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2018.09.020
关键词
Diphosphate; Crystal structure; Photoluminescence; Flux method
资金
- National Natural Science Foundation of China [51671080, 51471065, 21201056, U1304522]
- Program for Innovative Research Team (in Science and Technology) in the University of Henan Province [16IRTSTHN005]
- Fundamental Research Funds for the Universities of Henan Province [NSFRF170301]
- Program for Innovative Research Team of Henan Polytechnic University [T2018-3]
For the first time, a mixed-alkali diphosphate, Li2Na2P2O7, has been successfully obtained by high-temperature solution growth (HTSG) method. Single crystal X-ray diffraction analysis reveals that it contains anionic [Li2P2O7](infinity) network and 1D [Na](infinity) infinite chains, which are both running along the c-axis. Band structure calculations by density functional theory (DFT) method indicate that Li2Na2P2O7 has an indirect band gap of about 4.88 eV. Moreover, 1 mol% Eu3+ doped Li2Na2P2O7 phosphor was synthesized and its photoluminescence properties were investigated. Under near ultraviolet (NUV) excitation (394 nm), Li2Na2P2O7:0.01 Eu3+ phosphor exhibits a series of emission peaks corresponding to the D-5(0)-> F-7(J) (J = 0, 1, 2, 3, 4) transitions of Eu3+ ion with the CIE chromaticity coordinates of (0.599, 0.375).
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