Fabrication of core/shell structured SiO2/Zn2SiO4:Mn2+ composite and its photoluminescence properties

被引：0
|
作者：
Jehong Park
Jongsu Kim
Hansang Kwon
机构：
[1] Next-Generation Materials Co. Ltd. (NGM),Department of Display Engineering
[2] Pukyong National University,Department of Materials System Engineering
[3] Pukyong National University,undefined
来源：
Journal of the Korean Physical Society | 2017年 / 71卷
关键词：
Core/shell structured composite; Manganese doped zinc silicate; Thermal diffusion; Solid state reaction; Photoluminescence; 81.20.Ev; 81.20.-n; 81.05.-t; 81.90.+c; 78.55.-m;
D O I：
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中图分类号：
学科分类号：
摘要：
Core/shell structured SiO2/Zn2SiO4:Mn2+ composite was prepared by thermal-diffusion reaction between SiO2 and Zn1−xMnxO particles, which is a low cost solid-state method. The X-ray diffraction and scanning electron microscope results showed that a 5-μm-thick dense Zn2SiO4:Mn2+ layer was successfully formed on the surface of the SiO2 particles. The PL spectrum of the SiO2/Zn2SiO4:Mn2+ composite revealed a green emission peak at 526 nm with PL intensity 20% higher than that of the conventional Zn2SiO4:Mn2+ particles. In addition, the decay time of the SiO2/Zn2SiO4:Mn2+ composite was shorter (τ10% = 7 ms) than that of the conventional Zn2SiO4:Mn2+ particles (τ10% =12 ms), which is owing to the relaxation of forbidden transition of Mn2+ ions due to the localized stress of Mn2+ ions arising from the surface tension in the SiO2/Zn2SiO4:Mn2+ composite.
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页码：370 / 373
页数：3
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