Stability and photoluminescence of Bi doped (La,Y) 2 O 3 phosphor powders

被引：0
作者：
Jaffar, Babiker M. [1 ,2 ]
Swart, H. C. [1 ]
Ahmed, H. A. A. Seed [2 ]
Yousif, A. [2 ]
Kroon, R. E. [1 ]
机构：
[1] Univ Free State, Dept Phys, Box 339, ZA-9300 Bloemfontein, South Africa
[2] Univ Khartoum, Dept Phys, Box 321, Omdurman 11115, Sudan
来源：
MATERIALS RESEARCH BULLETIN | 2024年 / 179卷
基金：
新加坡国家研究基金会;
关键词：
Bismuth ions; Stability; Photoluminescence; LUMINESCENCE PROPERTIES; SOLID-SOLUTIONS; SYSTEM; ION; TEMPERATURE; BISMUTH; Y2O3; PB2+;
D O I：
10.1016/j.materresbull.2024.112950
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
La 2-y Y y O 3 phosphor powders were prepared via the citric acid sol-gel combustion method and their stability was checked after four months of storage in the atmosphere using X-ray diffraction. The material, like La 2 O 3 , was prone to hydroxylation unless a high proportion of Y was added, which also caused changes in the phases present. Based on its stability, the composition La 0.5 Y 1.5 O 3 was selected for further study with Bi doping. The luminescence from this material was not as intense as that from Y 2-x O 3 :Bi x =0.005 , but there was a significant shift in colour as a result of the added La which meant that emission from the Bi 3 + ions at the S 6 sites of the alloy was close to that of unstable La 2 O 3 on the colour chart.
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页数：8
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