Four-Dimensional Incommensurate Modulation and Luminescent Properties of Host Material Na3La(PO4)2.
A series of orthophosphates Na3Ln(PO4)2(Ln = lanthanoids) have for a long time been known as good luminescent materials, yet their crystal structures have not been studied in full detail. In this work, compound Na3La(PO4)2was prepared using molten salt (flux) method and for the first time was structurally determined on X-ray single-crystal diffraction data. Interestingly, it crystallizes in the four-dimensional incommensurately modulated structure with orthorhombic superspace group Pca21(0β0)000 and modulation wave vector q = 0.387b*. Furthermore, to evaluate the potentiality of Na3La(PO4)2to be used as a luminescent host material, 5 mol % Eu3+, Tb3+, and Dy3+doped phosphors were prepared, respectively. The excitation spectra, emission spectra, decay time, quantum efficiency, and the color purity of prepared phosphors, Na3La0.95Eu0.05(PO4)2, Na3La0.95Tb0.05(PO4)2, and Na3La0.95Dy0.05(PO4)2, were studied.
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Dan
http://orcid.org/0000-0002-1573-4299
D
Zhao
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Fa-Xue
FX
Ma
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Shu-Qi
SQ
Ma
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Ai-Yun
AY
Zhang
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Cong-Kui
CK
Nie
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Min
M
Huang
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Lei
L
Zhang
College of Chemistry and Chemical Engineering, Henan Polytechnic University , Jiaozuo, Henan Province 454000, China.
Yun-Chang
YC
Fan