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Y_3Al_5O_(12):Tb~(3+)粉体的制备及其发光特性
作者:王博宇 徐进章 张志华  
单位:兰州大学核科学与技术学院 兰州大学核科学与技术学院 兰州大学核科学与技术学院 兰州730000 兰州730000 兰州730000 
关键词:助熔剂  钇铝石榴石  铽离子掺杂  发光特性  固相反应 
分类号:O482.31
出版年,卷(期):页码:2008,36(4):510-514
DOI:
摘要:

以AlF3和H3BO3作助熔剂,经过固相反应,在1350℃保温4h成功制备出结晶较好、粒度分布均匀且粒径为0.5~2.0μm的Y3Al5O12:Tb3+(YAG:Tb)单相粉末样品。通过对样品的紫外光和真空紫外光激发下的发光特性研究,发现在147nm真空紫外光的激发下,YAG:Tb样品的真空紫外激发光谱(λem=543nm)由位于140~190nm之间的铝酸根基团吸收、O2–→Y3+电荷迁移带吸收以及Tb3+的特征吸收组成,其发射光谱由激活离子的特征发射峰构成,发光强度有明显提高。

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Using AlF3 and H3BO3 as flux, Y3Al5O12:Tb3+ (YAG:Tb) green phosphors powder with a size of 0.5–2.0 μm and very good single phases was prepared by the solid state reaction at 1 350 ℃ for 4 h. The photoluminescence of YAG:Tb was investigated in the ultraviolet and vacuum ultraviolet regions. The reswlts show that the vacuum ultraviolet excitation spectra (λem=543 nm) of YAG:Tb phosphors consists of the broad band from 140–190 nm attributed to the AlO4 group absorption, Y3+→O2– charge transfer band and the Tb3+ activator characteristic absorption. The strong luminescence of vacuum ultraviolet emission originates from the characteristic emission of Tb3+ activator. YAG:Tb phosphors prepared by solid state reaction have much better emission intensity.

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基金项目:
甘肃省自然基金(3ZS051-A25-055)资助项目
作者简介:
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参考文献:

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