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12CaO·7Al2O3/5CaO·3Al2O3：Sm3+新型红色荧光粉的制备及发光性质
Synthesis and Photoluminescence Characteristics of 12CaO·7Al2O3/5CaO·3Al2O3：Sm3+ Red Phosphors
- 发光学报 2014年35卷第8期 页码：911-916
- 作者机构：
1. 东北师范大学 物理学院,吉林 长春,130021
2. 伊犁师范学院 物理科学与技术学院, 新疆 伊宁,835000
- 作者简介：
- 基金信息：国家自然科学基金（10874023，11074031，11374047，11304036）();伊犁师范学院项目（2011YNYB033）资助()
DOI：10.3788/fgxb20143508.0911
中图分类号： O482.31收稿日期：2014-04-21，
修回日期：2014-06-03，
纸质出版日期：2014-08-03
- 稿件说明：
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张新阳, 孙尚前, 严端廷等. 12CaO·7Al<sub>2</sub>O<sub>3</sub>/5CaO·3Al<sub>2</sub>O<sub>3</sub>：Sm<sup>3+</sup>新型红色荧光粉的制备及发光性质[J]. 发光学报, 2014,35(8): 911-916
ZHANG Xin-yang, SUN Shang-qian, YAN Duan-ting etc. Synthesis and Photoluminescence Characteristics of 12CaO·7Al<sub>2</sub>O<sub>3</sub>/5CaO·3Al<sub>2</sub>O<sub>3</sub>：Sm<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 911-916
张新阳, 孙尚前, 严端廷等. 12CaO·7Al<sub>2</sub>O<sub>3</sub>/5CaO·3Al<sub>2</sub>O<sub>3</sub>：Sm<sup>3+</sup>新型红色荧光粉的制备及发光性质[J]. 发光学报, 2014,35(8): 911-916 DOI： 10.3788/fgxb20143508.0911.
ZHANG Xin-yang, SUN Shang-qian, YAN Duan-ting etc. Synthesis and Photoluminescence Characteristics of 12CaO·7Al<sub>2</sub>O<sub>3</sub>/5CaO·3Al<sub>2</sub>O<sub>3</sub>：Sm<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 911-916 DOI： 10.3788/fgxb20143508.0911.
摘要
采用自蔓延燃烧法制备了不同Sm
3+
掺杂浓度的12CaO7Al
2
O
3
（C12A7：
x
%Sm
3+
）荧光粉。在404 nm近紫外光激发下，观察到了位于565，599，648 nm附近的3个光发射峰，分别归属于Sm
3+
的
4
G
5/2
6
H
J
/2
（
J
=5，7，9）能级跃迁。随着Sm
3+
掺杂浓度增加，红光发射强度呈现了先增大后减小的规律，优化的Sm
3+
掺杂摩尔分数为1.5%，发光的浓度猝灭效应可归因于Sm
3+
之间发生了交叉弛豫过程。采取混相策略，通过降低初始粉体的煅烧温度至900℃获得了12CaO7Al
2
O
3
/5CaO3Al
2
O
3
：1.5%Sm
3+
（C12A7/C5A3：Sm
3+
）混相荧光粉，进一步提高了红光发射强度。利用变温光致发光谱计算得到混相样品的热激活能约为200 meV，结果表明该混相荧光粉具有良好的热稳定性。
Abstract
12CaO7Al
2
O
3
(C12A7:Sm
3+
) phosphors with different Sm
3+
doping concentrations were synthesized through self-propagating combustion method. Under 404 nm UV excitation
there are three dominating emission peaks observed at 565
599 and 648 nm
corresponding to the
4
G
5/2
6
H
J
/2
(
J
=5
7
9) transitions of Sm
3+
respectively. With the increasing of Sm
3+
doping concentration
the red emitting intensity exhibited a behavior that increased firstly and then decreased. The optimal Sm
3+
ion concentration is 1.5% and the concentration quenching effect is due to the cross-relaxation (CR) processes between the Sm
3+
ions. Through adopting mixed-phase strategy
12CaO 7Al
2
O
3
/5CaO3Al
2
O
3
:1.5%Sm
3+
(C12A7/C5A3:Sm
3+
) powders were prepared by decreasing the calcining temperature to 900℃ and the enhanced red emitting intensity was obtained. The temperature-dependent photoluminescence showed that the thermal activation energy of the mixed-phase sample is about 200 meV and its thermal stability is high.
关键词
Keywords
references
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