Theoretical spectra identification and fluorescent properties of reddish orange Sm-doped BaTiO3 phosphors

被引：0
|
作者：
Zhang, Lei [1 ]
Pan, Hong [1 ]
Liu, Honggang [2 ]
Zhang, Binbin [1 ]
Jin, Long [1 ]
Zhu, Minhao [1 ]
Yang, Weiqing [1 ]
机构：
[1] Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu,610031, China
[2] Department of Materials Science, Sichuan University, Chengdu, 610064, China
来源：
Journal of Alloys and Compounds | 2015年 / 643卷
关键词：
Abstract The reddish orange Sm3+-doped tetragonal perovskite BaTiO3 (BTO) phosphors for white LEDs were synthesized by the simple solid state reaction method. These phosphors; which can be effectively excited by the near ultraviolet light 409 nm (6P3/2 (Γ7) → 6H5/2 (Γ7)); produces the emitted reddish orange light peaks locate at about 561 nm; 595 nm and 643 nm originated from the transitions of 4G5/2 (Γ7) → 6H5/2 (Γ7); 4G5/2; (Γ7); →; 6H7/2; and; 6H9/2; Moreover; in order to calculate the fluorescent spectra of these phosphors; the complete 2002 × 2002 energy matrix was successfully constructed by an effective operator Hamiltonian including the free ion and crystal field interactions. Sixteen experimental fluorescent spectra in visible light range for Sm3+ ion at the tetragonal (C4v) Ba2+ site of BTO crystal; firstly; were accurately and quantitatively indentified from a complete diagonalization (of energy matrix) method (CDM) through only five crystal field parameters. The fitting values are very close to the experimental results; evidently proving the capability of CDM to investigate the luminescent phosphors alike in kind for w-LEDs. © 2015 Elsevier B.V. All rights reserved;
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页码：247 / 252
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