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1. 福州大学 材料科学与工程学院,福建 福州,350108
2. 厦门理工学院 材料科学与工程学院,福建 厦门,361024
纸质出版日期:2015-4-3,
收稿日期:2015-1-7,
修回日期:2015-3-3,
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崔祥水, 陈文哲,. 稀土离子(Eu<sup>3+</sup>,Tb<sup>3+</sup>,Ce<sup>3+</sup>)掺杂ZnAl<sub>2</sub>O<sub>4</sub>/SiO<sub>2</sub>微晶玻璃的制备与发光性能[J]. 发光学报, 2015,36(4): 400-407
CUI Xiang-shui, CHEN Wen-zhe,. Preparation and Luminescence Properties of ZnAl<sub>2</sub>O<sub>4</sub>/SiO<sub>2</sub>:<em>RE</em><sup>3+</sup> (<em>RE</em>=Eu, Tb, Ce) Glass Ceramics by Sol-gel Method[J]. Chinese Journal of Luminescence, 2015,36(4): 400-407
崔祥水, 陈文哲,. 稀土离子(Eu<sup>3+</sup>,Tb<sup>3+</sup>,Ce<sup>3+</sup>)掺杂ZnAl<sub>2</sub>O<sub>4</sub>/SiO<sub>2</sub>微晶玻璃的制备与发光性能[J]. 发光学报, 2015,36(4): 400-407 DOI: 10.3788/fgxb20153604.0400.
CUI Xiang-shui, CHEN Wen-zhe,. Preparation and Luminescence Properties of ZnAl<sub>2</sub>O<sub>4</sub>/SiO<sub>2</sub>:<em>RE</em><sup>3+</sup> (<em>RE</em>=Eu, Tb, Ce) Glass Ceramics by Sol-gel Method[J]. Chinese Journal of Luminescence, 2015,36(4): 400-407 DOI: 10.3788/fgxb20153604.0400.
采用凝胶法分别制备出4.5ZnO-5.5Al
2
O
3
-90SiO
2
(ZAS)以及ZAS[DK]:
RE
3+
(
RE
=Eu
Tb
Ce) 透明微晶玻璃。利用X射线衍射仪(XRD)、透射电子显微镜(TEM)和荧光光谱仪(PL)等测试手段
研究了稀土离子掺杂浓度对ZAS微晶玻璃的结构和发光性能的影响。XRD结果表明
ZAS[DK]:
RE
3+
(
RE
=Eu
Tb
Ce)微晶玻璃包含ZnAl
2
O
4
晶相和SiO
2
非晶相
ZnAl
2
O
4
平均晶粒尺寸约为30 nm
稀土离子的掺杂没有显著改变原来的ZnAl
2
O
4
晶体结构。TEM结果表明
900 ℃时ZnAl
2
O
4
从ZAS体系中析出。PL光谱显示
Eu
3+
存在
5
D
0
7
F
2
跃迁
ZAS[DK]:Eu
3+
在611 nm 处发出强烈的红色光;由于Tb
3+
的
5
D
4
7
F
5
跃迁
ZAS[DK]:Tb
3+
在541 nm 处发出明亮的绿色光;ZAS[DK]:Ce
3+
在381 nm处显示了蓝光发射
对应于Ce
3+
的5d4f 轨道跃迁。ZAS[DK]:
RE
3+
(
RE
=Eu
Tb
Ce)的PL发射光谱存在着浓度猝灭现象
Eu
3+
、Tb
3+
和Ce
3+
的最佳单掺杂摩尔分数分别为20%、20%和3%。CIE色度图表明
ZAS[DK]:
RE
3+
(
RE
=Eu
Tb
Ce)的色坐标分别位于红光、绿光和蓝光区域。实验结果表明
ZAS:
RE
3+
(
RE
=Eu
Tb
Ce) 微晶玻璃是一种良好的可用于全色显示的白光LED材料。
Transparent bulk glass ceramics of 4.5ZnO-5.5Al
2
O
3
-90SiO
2
(ZAS) and single doped ZAS:
RE
3+
(
RE
=Eu
Tb
Ce) were synthesized by sol-gel method. X-ray diffraction (XRD)
transmission electron microscopy (TEM) and photoluminescence (PL) spectra were employed to study the influence of doping rare-earth ions concentration on the structure and luminescence properties of ZAS glass-ceramics. XRD results show that ZAS:
RE
3+
(
RE
=Eu
Tb
Ce) glass ceramics heat-treated at 900 ℃ consist of ZnAl
2
O
4
phase with average grain size of 30 nm and amorphous SiO
2
. TEM results show that ZnAl
2
O
4
were precipitated from ZAS system when heat-treated at 900 ℃
and doping ions have not changed the original structure. PL spectra indicate that ZAS:Eu
3+
emits intense 611 nm red light originating from
5
D
0
7
F
2
transition of Eu
3+
ions
ZAS:Tb
3+
shows 541 nm green emission attributed to
5
D
4
7
F
5
transition of Tb
3+
ions
and ZAS:Ce
3+
gives 381 nm blue light corresponding to the 5d to 4f transition of Ce
3+
ions. Furthermore
the concentration quenching phenomena are observed while the single doping mole fraction of Eu
3+
Tb
3+
and Ce
3+
was 20%
20% and 3%
respectively. The excellent Commission International de I'Eclairage (CIE) chromaticity coordinates of ZAS:
RE
3+
(
RE
=Eu
Tb
Ce) glass-ceramics indicate that they are good candidates for the application of white LEDs.
ZAS微晶玻璃溶胶-凝胶法稀土离子掺杂发光性能
ZAS glass ceramicssol-gel methodrare-earth ions dopedluminescence properties
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