A computational and spectroscopic study of Dy3+ doped BaAl2O4 phosphors

被引:6
作者
Rezende, Marcos V. dos. S. [1 ]
Montes, Paulo J. R. [2 ]
Valerio, Mario E. G. [3 ]
Jackson, Robert A. [4 ]
机构
[1] Univ Fed Sergipe, Dept Fis, Grp Nanomat Funcionais GNF, Campus Univ, BR-49100000 Itabaiana, SE, Brazil
[2] Inst Fed Sergipe, Coordenadoria Fis, BR-49400000 Lagarto, SE, Brazil
[3] Univ Fed Sergipe, Dept Fis, Campus Univ, BR-49100000 Sao Cristovao, SE, Brazil
[4] Keele Univ, Sch Chem & Phys Sci, Keele ST5 5BG, Staffs, England
关键词
Optical materials; Computer modelling and simulation; Defects; Optical properties; Luminescence; EXCITED OPTICAL LUMINESCENCE; LONG-LASTING PHOSPHOR; MECHANISM; PARAMETERS; DEPENDENCE; ALUMINATE; CRYSTALS; SRAL2O4; SPECTRA;
D O I
10.1016/j.optmat.2018.06.039
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Computational and experimental methods are employed to study the optical properties of Dy-doped BaAl2O4 matrix. Atomistic modelling is used to make predictions of Dy doping sites and charge compensation schemes. The symmetry predicts from atomistic modeling was used to calculate crystal field parameters and to obtain the energies of the electronic transitions of the Dy3+ ion. Dy-doped BaAl2O4 was prepared via a sol-gel proteic technique. The optical properties were studied using X-ray excited optical luminescence (XEOL) measurements. The X-ray absorption near-edge structure (XANES) at the Ba and Eu L-III-edges exhibits typical absorption spectra. The area under the XEOL spectra increases as the photon energy increases in the region around the Ba and Dy LIB-edges. The XEOL spectra showed typical Dy lines. Experimental and calculated values for the transition energies are compared. Computational and experimental methods are employed to study of Dy-doped BaAl2O4 matrix. Atomistic modelling is used to make predictions of Dy doping sites. The optical properties were studied using XEOL measurements.
引用
收藏
页码:328 / 332
页数:5
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