Laser-Activated Luminescence of BaAl2O4:Eu

被引：11
|
作者：
den Engelsen, Daniel [1 ]
Fern, George R. [1 ]
Ireland, Terry G. [1 ]
Silver, Jack [1 ]
机构：
[1] Brunel Univ London, Ctr Phosphor & Display Mat, Wolfson Ctr Mat Proc, Uxbridge UB8 3PH, Middx, England
来源：
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY | 2020年 / 9卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
CRYSTAL-STRUCTURE; PERSISTENT LUMINESCENCE; SYNCHROTRON-RADIATION; PHOTOLUMINESCENCE; ALUMINATE; PHOSPHORS; EU2+; CATHODOLUMINESCENCE; EMISSION; BEHAVIOR;
D O I：
10.1149/2162-8777/ab682c
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this article the laser-activated (LA) luminescence of BaAl2O4 doped with 3 mol% Eu2+ and SrAl2O4 doped with 700 ppm Eu2+ is described. The LA spectrum of BaAl2O4:Eu did not show any emission from Eu2+, but rather luminescence from the Eu3+ ion. This surprising result is explained in terms of ionization of the excited Eu2+ ions (photo-ionization), while the freed electrons are trapped in an excited state of the F-centre: this is considered to be a deep trap. The temperature of the ferroelectric-paraelectric phase transition in BaAl2O4 has been determined at 180 degrees C from the Raman spectra recorded at various temperatures. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
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页数：6
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