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1. 广东工业大学 轻工化工学院,广东 广州,510006
2. 中山大学 化学与化工学院,广东 广州,510275
收稿日期:2009-12-07,
修回日期:2010-03-11,
网络出版日期:2010-11-22,
纸质出版日期:2010-11-22
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杨红梅, 石建新, 龚孟濂, 梁宏斌. 一种具有应用潜力的等离子体用绿色荧光粉[J]. 发光学报, 2010,31(6): 791-795
YANG Hong-mei, SHI Jian-xin, GONG Meng-lian, LIANG Hong-bin. A Potential Green Phosphor for Application in PDP[J]. Chinese Journal of Luminescence, 2010,31(6): 791-795
研究了绿色荧光粉Ca
2
GeO
4
:Tb
3+
的真空紫外光谱性质
用172nm激发荧光粉
其发射峰在549nm
此绿色发光峰归属于Tb
3+
的
5
D
4
7
F
5
磁偶极跃迁
Tb
3+
离子的最佳摩尔分数
x
=0.05。激发光谱中147nm和172nm的激发强度分别是218nm的1.5和1.7倍。因为在等离子体显示中激发光波长是147nm和172nm
因此荧光粉在这两个波长的激发强度对荧光粉在等离子体显示中的应用至关重要。Al
3+
的共掺杂可使荧光粉的发光强度增强2倍
因此
Ca
2
GeO
4
:Tb
3+
是一种具有应用潜力的等离子体显示用绿色荧光粉。
Structural characterization of the luminescent material Ca
2
GeO
4
:Tb
3+
was carried out with X-ray powder diffraction analysis. The VUV luminescence property of the green emitting phosphor Ca
2
GeO
4
:Tb
3+
was studied in details. When absorption at 172 nm
the phosphor shows bright green emission at 549 nm due to the
5
D
4
7
F
5
magnetic dipole transition
the optimum Tb
3+
doping concentration is
x
=0.05. The absorption intensity at 147 nm and 172 nm is almost 1.5 and 1.7 times of that at 218 nm
respectively. It is worthy to point out that the intense excitation at 147 nm and 172 nm in UVU region makes it undoubtedly convenient to apply in PDP
because the wavelength of excitation source in PDP is mainly at 147 nm and 172 nm. In addition
the Al
3+
co-doping enhances the green emission from Ca
2
GeO
4
:Tb
3+
by about 2 times under VUV excitation. The excellent luminescence properties make it possible as a good candidate for the PDP application.
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