Blue-shift of Eu2+ emission in (Ba,Sr)3Lu(PO4)3:Eu2+ eulytite solid-solution phosphors resulting from release of neighbouring-cation-induced stress

Ziyuan Wang; Zhiguo Xia; Maxim S. Molokeev; Victor V. Atuchin; QuanLin Liu

doi:10.1039/C4DT02319F

Blue-shift of Eu²⁺ emission in (Ba,Sr)₃Lu(PO₄)₃:Eu²⁺ eulytite solid-solution phosphors resulting from release of neighbouring-cation-induced stress†

Ziyuan Wang,^a Zhiguo Xia,*^ab Maxim S. Molokeev,

^c Victor V. Atuchin^def and QuanLin Liu^b

Author affiliations

* Corresponding authors

^a School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China

^b School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China
E-mail: xiazg@ustb.edu.cn
Fax: +86-10-823-77955
Tel: +86-10-823-77955

^c Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia

^d Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia

^e Functional Electronics Laboratory, Tomsk State University, Tomsk 634050, Russia

^f Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk 630090, Russia

Abstract

A series of iso-structural eulytite-type (Ba,Sr)₃Lu(PO₄)₃:Eu²⁺ solid-solution phosphors with different Sr/Ba ratios were synthesized by a solid-state reaction. Crystal structures of (Ba,Sr)₃Lu(PO₄)₃:Eu²⁺ were resolved by the Rietveld method, which shows an eulytite-type cubic Bi₄(SiO₄)₃ structure with cations disordered in a single C₃ site while the oxygen atoms were distributed over two partially occupied sites. The emission peaks of Ba_(3−x)Sr_xLu(PO₄)₃:Eu²⁺ (0 ≤ x ≤ 3) phosphors were blue-shifted, from 506 to 479 nm, with increasing Sr/Ba ratio upon the same excitation wavelength of 365 nm, and such interesting luminescence behaviours can also be found in other eulytite-type (Ba,Sr)₃Ln(PO₄)₃:Eu²⁺ (Ln = Y, Gd) solid-solution phosphors. The blue-shift of the Eu²⁺ emission with increasing Sr/Ba ratio was ascribed to the variation of the crystal field strength that the 5d orbital of Eu²⁺ ion experiences, and a new model based on the Eu–O bond length and released neighboring-cation stress in disordered Ba²⁺/Sr²⁺/Ln³⁺ sites is proposed.

Article information

https://doi.org/10.1039/C4DT02319F

Article type

Paper

Submitted

31 Jul 2014

Accepted

11 Sep 2014

First published

11 Sep 2014

Download Citation

Dalton Trans., 2014,43, 16800-16804

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Blue-shift of Eu²⁺ emission in (Ba,Sr)₃Lu(PO₄)₃:Eu²⁺ eulytite solid-solution phosphors resulting from release of neighbouring-cation-induced stress

Z. Wang, Z. Xia, M. S. Molokeev, V. V. Atuchin and Q. Liu, Dalton Trans., 2014, 43, 16800 DOI: 10.1039/C4DT02319F

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