Optical properties and electronic band structure of BiMg2PO6, BiMg2VO6, BiMg2VO6:Pr3+ and BiMg2VO6:Eu3+

被引:57
作者
Barros, A. [1 ,2 ,3 ]
Deloncle, R. [1 ]
Deschamp, J. [1 ]
Boutinaud, P. [2 ]
Chadeyron, G. [2 ]
Mahiou, R. [3 ]
Cavalli, E. [4 ]
Brik, M. G. [5 ]
机构
[1] RevLum SAS, F-63100 Clermont Ferrand, France
[2] Univ Clermont Ferrand, ENSCCF, Inst Chim Clermont Ferrand, F-63000 Clermont Ferrand, France
[3] CNRS, ICCF, UMR 6296, F-63177 Aubiere, France
[4] Univ Parma, Dipartimento Chim Gen & Inorgan, I-43100 Parma, Italy
[5] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
关键词
BiMg2PO6; BiMg2VO6; Luminescence; Electronic structure; DOS; BISMUTH MAGNESIUM VANADATE; CRYSTAL-STRUCTURE; LUMINESCENCE;
D O I
10.1016/j.optmat.2014.02.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The luminescence properties of the yellow pigment BiMg2VO6 are revisited and those of BiMg2PO6, BiMg2VO6:Pr3+ and BiMg2VO6:Eu3+ are described. It is shown that the undoped systems exhibit broad band emission in the green or orange spectral regions, but only upon UV or near UV excitation. In contradiction with a previous report, we found that the blue, host absorbed, photons are lost non-radiatively and do not contribute to the luminescence processes in BiMg2VO6. To understand these experimental results, the optical properties of BiMg2VO6 and BiMg2PO6 are theoretically analysed on the basis of electronic structure diagrams calculated by the DFT method. It is found that the optical transitions are mostly localised within [VO4](3-) units or non-regular Bi3+ ions and occur in the UV or near UV regions. The luminescence of the trivalent lanthanide dopants is weak (Eu3+) or unobserved (Pr3+) in BiMg2VO6 which is explained by inefficient energy migration in the host lattice to the impurity sites. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:1724 / 1729
页数:6
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