Synthesis and photoluminescence properties of Li2SO4: RE (RE = Eu3+, Tb3+, Gd3+ and Ce3+) phosphors

被引：7
|
作者：
Taikar, D. R. [1 ]
Tamboli, Sumedha [2 ]
Dhoble, S. J. [2 ]
机构：
[1] Shri Lemdeo Patil Mahavidyalaya, Dept Phys, Nagpur, Maharashtra, India
[2] RTM Nagpur Univ, Dept Phys, Nagpur 440033, Maharashtra, India
来源：
OPTIK | 2017年 / 139卷
关键词：
Li2SO4; Photoluminescence; Solid state lighting; Phototherapy; EVI; MIXED-METAL OXIDES; ELECTRON-VIBRATIONAL INTERACTION; ENERGY-TRANSFER; CRYSTAL-STRUCTURE; 5D STATES; LUMINESCENCE; PHOTOTHERAPY; IONS; THERMOLUMINESCENCE; FLUORESCENCE;
D O I：
10.1016/j.ijleo.2017.03.115
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Li2SO4 activated with trivalent rare earth ions Eu3+, Tb3+, Gd3+ and Ce3+ were prepared by the wet chemical method which is suitable for large scale production and is an eco-friendly method. Prepared phosphors were characterized by photoluminescence technique. Photoluminescence emission spectra of Eu3+ and Tb3+ doped Li2SO4 compound shows red and green emission, respectively, under efficient n-UV (350-400 nm) excitation. This indicates that these phosphors are good and promising candidates for eco-friendly solid state lighting application. Photoluminescence of Li2SO4:Gd3+ compound shows narrow band (NB) UV-B (311 nm) emission which is in good agreement with TL-01 lamp used for treatment of psoriasis. Li2SO4 doped with Ce3+ ions possess broad emission from 300 nm to 400 nm. Electron vibrational interaction (EVI) parameters were determined for Ce3+ emission which show intermediate coupling regime. Emission spectrum of Li2SO4: Ce3+ compound matches well with emission spectrum of Sylvania broad band (UV6) lamp which is also used for phototherapy treatment. (C) 2017 Elsevier GmbH. All rights reserved.
引用
收藏
页码：111 / 122
页数：12
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