Issue 12, 2011
From the journal:

Journal of Materials Chemistry

Luminescence properties and site occupations of Eu3+ ions doped in double phosphates Ca9R(PO4)7 (R = Al, Lu)

Fuping Du,a   Yosuke Nakai,b   Taiju Tsuboi,b   Yanlin Huang*a  and  Hyo Jin Seo*c  

* Corresponding authors

a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
E-mail: huang@suda.edu.cn

b Faculty of Engineering, Kyoto Sangyo University, Kamigamo, Kyoto, Japan

c Department of Physics, Pukyong National University, Busan, Republic of Korea
E-mail: hjseo@pknu.ac.kr

Abstract

Eu3+ doped red-emitting phosphors of double phosphates Ca9R(PO4)7 (R = Al, Lu) were synthesized by a general high temperature solid-state reaction. The phosphors were characterized by X-ray powder diffraction (XRD). The detailed luminescence properties, e.g., the emission spectra under the excitation of UV light, the photoluminescence excitation spectra and decay lifetimes were reported. The phosphors can be efficiently excited by near UV light to realize an intense red luminescence (613 nm) corresponding to the electric dipole transition 5D0 → 7F2 of Eu3+ ions. The luminescence properties and the potential applications were analyzed. These phosphors were investigated by the site-selective emission spectra and the fluorescence decay curves in the 5D0 → 7F0 region using a pulsed, tunable, narrowband dye laser. It is suggested that Eu3+ ions have three different crystallographic sites doped in Ca9Al(PO4)7, and five sites in Ca9Lu(PO4)7 host. The site assignments of Eu3+ ions in Ca9R(PO4)7 (R = Al, Lu) were discussed on the base of both optical spectroscopy results and structural analysis.

Graphical abstract: Luminescence properties and site occupations of Eu3+ ions doped in double phosphates Ca9R(PO4)7 (R = Al, Lu)

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Article information

DOI
https://doi.org/10.1039/C0JM03324C
Article type
Paper
Submitted
03 Oct 2010
Accepted
17 Jan 2011
First published
14 Feb 2011

J. Mater. Chem., 2011,21, 4669-4678

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Luminescence properties and site occupations of Eu3+ ions doped in double phosphates Ca9R(PO4)7 (R = Al, Lu)

F. Du, Y. Nakai, T. Tsuboi, Y. Huang and H. J. Seo, J. Mater. Chem., 2011, 21, 4669 DOI: 10.1039/C0JM03324C

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