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Four-Dimensional Incommensurate Modulation and Luminescent Properties of Host Material Na<sub>3</sub>La(PO<sub>4</sub>)<sub>2</sub>

DOI

38

Citations

61

References

2017

Year

Dan Zhao, Fa‐Xue Ma, Shuqi Ma, Aiyun Zhang, Cong-Kui Nie, Min Huang, Lei Zhang, Yun-Chang Fan
Inorganic Chemistry

Abstract

A series of orthophosphates Na<sub>3</sub>Ln(PO<sub>4</sub>)<sub>2</sub> (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 Na<sub>3</sub>La(PO<sub>4</sub>)<sub>2</sub> was 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 Pca2<sub>1</sub>(0β0)000 and modulation wave vector q = 0.387b*. Furthermore, to evaluate the potentiality of Na<sub>3</sub>La(PO<sub>4</sub>)<sub>2</sub> to be used as a luminescent host material, 5 mol % Eu<sup>3+</sup>, Tb<sup>3+</sup>, and Dy<sup>3+</sup> doped phosphors were prepared, respectively. The excitation spectra, emission spectra, decay time, quantum efficiency, and the color purity of prepared phosphors, Na<sub>3</sub>La<sub>0.95</sub>Eu<sub>0.05</sub>(PO<sub>4</sub>)<sub>2</sub>, Na<sub>3</sub>La<sub>0.95</sub>Tb<sub>0.05</sub>(PO<sub>4</sub>)<sub>2</sub>, and Na<sub>3</sub>La<sub>0.95</sub>Dy<sub>0.05</sub>(PO<sub>4</sub>)<sub>2</sub>, were studied.

References

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