Energy transfer behavior of Fe3+ to Cr3+ in LiAl5O8 phosphors

被引：7
|
作者：
Silva, Ariosvaldo J. S. [1 ]
Nascimento, Patresio A. M. [1 ]
Silveira, Wellisson S. [1 ]
Carvalho, Iure da S. [1 ]
Rezende, Marcos V. dos S. [1 ]
机构：
[1] Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, SE, Brazil
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 927卷
关键词：
Lithium aluminates; Energy transfer; Simultaneous excitation; EXCITED OPTICAL LUMINESCENCE; RED-EMITTING PHOSPHOR;
D O I：
10.1016/j.jallcom.2022.166959
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present the energy transfer (ET) and simultaneous excitation (SE) between Cr3+ and Fe3+ ions in LiAl5O8 phosphors prepared by the modified sol-gel method, using anhydrous glucose as a chelating agent. A model for the ET and SE dynamics was developed considering that the 8c and 12d aluminum sites are occupied by Fe3+ and Cr3+ ions, respectively. In the proposed model, a SE of Cr3+ and Fe3+ at 227 nm and an efficient energy transfer occurs from Fe3+ to Cr3+ dopant, leading to dual emission consisting of E-2(1) g ->(4)A(2) g (669 nm) transition from Cr3+ ions and T-4(1) g((4)G)->(6)A(1) g(S-6) transition from Fe-dopant state (715 nm). (c) 2022 Elsevier B.V. All rights reserved.
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页数：5
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