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1. 暨南大学 化学系,广东 广州,510632
2. 暨南大学 纳米化学研究所,广东 广州,510632
收稿日期:2010-11-02,
修回日期:2010-12-20,
纸质出版日期:2011
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肖全兰, 刘关喜, 邹少瑜, 彭文芳, 杨创涛, 张蕤, 谢丽娟, 孟建新. 新型红色荧光粉Na<sub>2</sub> Ca<sub>4</sub> (PO<sub>4</sub>)<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> ,Bi<sup>3+</sup>的 制备及发光特性[J]. 发光学报, 2011,32(4): 332-336
XIAO Quan-lan, LIU Guan-xi, ZOU Shao-yu, PENG Wen-fang, YANG Chuang-tao, ZHANG Rui, XIE Li-juan, MENG Jian-xin. Synthesis and Luminescent Properties of Na<sub>2</sub>Ca<sub>4</sub>(PO<sub>4</sub>)<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> ,Bi<sup>3+</sup> Red-emitting Phosphor[J]. Chinese Journal of Luminescence, 2011,32(4): 332-336
肖全兰, 刘关喜, 邹少瑜, 彭文芳, 杨创涛, 张蕤, 谢丽娟, 孟建新. 新型红色荧光粉Na<sub>2</sub> Ca<sub>4</sub> (PO<sub>4</sub>)<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> ,Bi<sup>3+</sup>的 制备及发光特性[J]. 发光学报, 2011,32(4): 332-336 DOI: 10.3788/fgxb20113204.0332.
XIAO Quan-lan, LIU Guan-xi, ZOU Shao-yu, PENG Wen-fang, YANG Chuang-tao, ZHANG Rui, XIE Li-juan, MENG Jian-xin. Synthesis and Luminescent Properties of Na<sub>2</sub>Ca<sub>4</sub>(PO<sub>4</sub>)<sub>2</sub>SiO<sub>4</sub> ∶ Eu<sup>3+</sup> ,Bi<sup>3+</sup> Red-emitting Phosphor[J]. Chinese Journal of Luminescence, 2011,32(4): 332-336 DOI: 10.3788/fgxb20113204.0332.
用高温固相法合成了用于白光LED的Na
2
Ca
4(1-
x-y
)
(PO
4
)
2
SiO
4
∶
x
Eu
3+
y
Bi
3+
红色荧光粉。研究了助熔剂H
3
BO
3
、二次煅烧时间和稀土掺杂量等制备条件对样品发光性质的影响。结果表明
在1 200 ℃、助熔剂H
3
BO
3
加入量为样品质量的3.8%时可得到更有利于发光的-NCPS基质
而且掺入Eu
3+
、Bi
3+
之后
基质的晶格结构没有发生明显变化;适宜的二次煅烧时间为1.5 h。Bi
3+
的共掺杂可以通过能量传递大幅提高Eu
3+
的发光强度
当Eu
3+
、Bi
3+
的摩尔分数分别为
x
=0.04和
y
=0.01时
粉体具有最强的红光发射。 表明这种荧光粉是一种可很好用于近紫外芯片的白光LED的红色荧光粉。
Novel red-emit phosphors
Na
2
Ca
4(1-
x-y
)
(PO
4
)
2
SiO
4
∶
x
Eu
3+
y
Bi
3+
were synthesized for WLED by conventional solid-state reaction at 1 200 ℃. Effects of the H
3
BO
3
flux
the re-calcination time and doping concentrations of Eu
3+
Bi
3+
on the luminescence properties were investigated. It was found that a higher Eu
3+
emission intensity can be obtained if 30% H
3
BO
3
was added as flux. No apparently structure transformation of the Na
2
Ca
4
(PO
4
)
2
SiO
4
matrix was observed after doping Eu
3+
Bi
3+
. The phosphors give the characteristic emission of Eu
3+
at 615 nm under the excitation of 395 nm. Samples re-calcined at 1 200 ℃ for 1.5 h gives a strongest emission. The red emission of Eu
3+
can be significantly enhanced by co-doping of Bi
3+
via an energy transfer process which involves the charge transfer (CT) transition of Eu
3+
-O
2-
Bi
3+
Eu
3+
. The optimized doping mole fractions of Eu
3+
and Bi
3+
are
x
=0.04 and
y
=0.01
respectively. It shows that the Na
2
Ca
4
-(PO
4
)
2
SiO
4
∶ Eu
3+
Bi
3+
is a promising red phosphor for NUV-chips based WLED.
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