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1. 四川大学 材料科学与工程学院, 四川 成都 610065
2. 重庆文理学院 材料交叉学科研究中心, 重庆市高校微纳米材料工程与技术重点实验室 重庆,402168
收稿日期:2011-05-20,
修回日期:2011-06-22,
网络出版日期:2011-09-22,
纸质出版日期:2011-09-22
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赵聪, 马明星, 韩涛, 曹仕秀, 雷宇, 朱达川. Y<sub><em>x</em></sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup>荧光粉的微结构及其发光特性[J]. 发光学报, 2011,32(9): 874-879
ZHAO Cong, MA Ming-xing, Han Tao, CAO Shi-xiu, Lei Yu, ZHU Da-chuan. Microstructure and Luminescence Characteristics of Y<sub><em>x</em></sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2011,32(9): 874-879
赵聪, 马明星, 韩涛, 曹仕秀, 雷宇, 朱达川. Y<sub><em>x</em></sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup>荧光粉的微结构及其发光特性[J]. 发光学报, 2011,32(9): 874-879 DOI:
ZHAO Cong, MA Ming-xing, Han Tao, CAO Shi-xiu, Lei Yu, ZHU Da-chuan. Microstructure and Luminescence Characteristics of Y<sub><em>x</em></sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2011,32(9): 874-879 DOI:
采用共沉淀法合成Y
x
Al
5
O
12
:Ce
3+
系列荧光粉
用多晶X 射线衍射、SEM及荧光光谱对Y
x
Al
5
O
12
:Ce
3+
系列荧光粉的晶体结构、形貌及发光性能进行表征。结果表明:随着
x
从2.64递增到3.06
波长先缓慢红移
然后迅速蓝移;发光强度先增强
然后迅速减弱;当
x
=2.88时
出现了最大发射峰值波长(
em
=537 nm)和最高相对发光强度。当
x
<2.64时
出现Al
2
O
3
杂相;
x
>3.06时
粉体中出现YAM杂相。
x
在2.76~2.88区间时
材料结晶度高
容易分散。
Y
x
Al
5
O
12
:Ce
3+
phosphors have been synthesized by co-precipitation method. The crystalline structure
morphology and luminescence properties of Y
x
Al
5
O
12
:Ce
3+
phosphors have been investigated by X-ray diffraction (XRD)
Scanning Electron Microscope (SEM) and fluorescence spectrophotometer. The results show that the emission wavelengths of as-prepared phosphors display red-shift at first and then blue-shift appears with the molar of Y
3+
increasing from 2.64 to 3.06. The emission intensity increases slowly with the mole of Y
3+
increasing from 2.64 to 2.88
but the intensity decreases sharply with different Y
3+
content when it was beyond 2.94. The maximum emission wavelength (
em
=537 nm) at the maximum intensity appears when
x
is 2.88. The impure phase-Al
2
O
3
appears when the content of Y
3+
is below 2.64. When the mole of Y
3+
exceeds 3.06
the impure phase-YAM appears
which has negative effects on the luminescence property of as-prepared phosphors. When the molar ratio of yttrium rises from 2.76 to 2.88
the powder is observed with high crystalline and easy dispersion.
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