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1. 惠州学院 化学工程系,广东 惠州,516007
2. 生物无机与合成化学教育部重点实验室 中山大学化学与化学工程学院, 广东 广州 510275
纸质出版日期:2015-10-10,
收稿日期:2015-7-13,
修回日期:2015-8-11,
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谢飞燕, 董志月, 刁贵强等. 一种新型的白光LED用绿色荧光粉Ca<sub>8</sub>MgLu(PO<sub>4</sub>)<sub>7</sub>:Tb<sup>3+</sup>[J]. 发光学报, 2015,36(10): 1132-1136
XIE Fei-yan, DONG Zhi-yue, DIAO Gui-qiang etc. A Novel Green Phosphor Ca<sub>8</sub>MgLu(PO<sub>4</sub>)<sub>7</sub>:Tb<sup>3+</sup> for Near Ultraviolet White Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(10): 1132-1136
谢飞燕, 董志月, 刁贵强等. 一种新型的白光LED用绿色荧光粉Ca<sub>8</sub>MgLu(PO<sub>4</sub>)<sub>7</sub>:Tb<sup>3+</sup>[J]. 发光学报, 2015,36(10): 1132-1136 DOI: 10.3788/fgxb20153610.1132.
XIE Fei-yan, DONG Zhi-yue, DIAO Gui-qiang etc. A Novel Green Phosphor Ca<sub>8</sub>MgLu(PO<sub>4</sub>)<sub>7</sub>:Tb<sup>3+</sup> for Near Ultraviolet White Light-emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(10): 1132-1136 DOI: 10.3788/fgxb20153610.1132.
采用高温固相法合成一种单一纯相绿色荧光粉Ca
8
MgLu(PO
4
)
7
:Tb
3+
通过X射线衍射(XRD)、荧光光谱(PLE
PL)和荧光寿命曲线研究了Ca
8
MgLu(PO
4
)
7
:Tb
3+
的发光性能。Ca
8
MgLu(PO
4
)
7
:Tb
3+
能被378 nm的近紫外光激发
Tb
3+
发生
5
D
4
-
7
F
5
跃迁发出绿光
色坐标为(0.324
0.592)。Ca
8
MgLu(PO
4
)
7
:Tb
3+
的量子效率可达84%
热猝灭性能良好:在150 ℃和200 ℃的发光强度积分分别是25 ℃的90.71%和86.36%。研究结果表明Ca
8
MgLu(PO
4
)
7
:Tb
3+
是一种理想的适于 NUV-LED芯片激发的白光LED 用绿色荧光粉。
A green-emitting phosphor
Ca
8
MgLu(PO
4
)
7
:Tb
3+
was synthesized by a solid-state reaction. The photoluminescence excitation (PLE)
emission (PL) spectra
and decay curves were measured to investigate photo-luminescent property of Tb
3+
in Ca
8
MgLu(PO
4
)
7
host. The excitation and emission spectra indicate that the phosphors can be effectively excited by the near ultraviolet (NUV) light (378 nm) and emit strong green emission of Tb
3+
5
D
4
-
7
F
5
transition. The CIE chromaticity (
x
y
) of Ca
8
MgLu(PO
4
)
7
:Tb
3+
is (0.324
0.592). The internal quantum efficiency of Ca
8
MgLu(PO
4
)
7
:Tb
3+
is as high as 84% under the excitation of 378 nm. The phosphors show a good thermal stability at high temperature (200 ℃)
and the emission intensity at 150 ℃ and 200 ℃ is 90.71% and 86.36% of that at 25 ℃. The results indicate that Ca
8
MgLu
1-
x
(PO
4
)
7
:
x
Tb
3+
can be served as a potential green-emitting phosphor candidate for NUV LED application.
荧光粉白光LEDCa8MgLu(PO4)7:Tb3+
phosphorsWLEDCa8MgLu(PO4)7:Tb3+
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