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东北师范大学 物理学院,吉林 长春,130021
纸质出版日期:2015-11-10,
收稿日期:2015-8-4,
修回日期:2015-9-11,
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陈雪岩, 杨健, 张猛等. 笼中阴离子基团对Nd<sup>3+</sup>掺杂C12A7粉体红外发光的影响[J]. 发光学报, 2015,36(11): 1240-1245
CHEN Xue-yan, YANG Jian, ZHANG Meng etc. Effect of Encaged-anion Groups on Infrared Luminescence of C12A7: Nd<sup>3+</sup> Powders[J]. Chinese Journal of Luminescence, 2015,36(11): 1240-1245
陈雪岩, 杨健, 张猛等. 笼中阴离子基团对Nd<sup>3+</sup>掺杂C12A7粉体红外发光的影响[J]. 发光学报, 2015,36(11): 1240-1245 DOI: 10.3788/fgxb20153611.1240.
CHEN Xue-yan, YANG Jian, ZHANG Meng etc. Effect of Encaged-anion Groups on Infrared Luminescence of C12A7: Nd<sup>3+</sup> Powders[J]. Chinese Journal of Luminescence, 2015,36(11): 1240-1245 DOI: 10.3788/fgxb20153611.1240.
采用自蔓延燃烧法制备了不同 Nd
3+
掺杂浓度的具有笼状结构的12CaO7Al
2
O
3
(C12A7 :
x
%Nd
3+
)粉体材料.在808 nm波长的激发下
观测到了位于887
1 069
1 340 nm附近的3个近红外发射峰
分别归属于Nd
3+
的
4
F
3/2
4
I
J
/2
(
J
=9
11
13)跃迁.Nd
3+
掺杂摩尔分数达到0.5%时
红外光发射较强
且没有观察到杂质相.在H
2
气氛下对样品进行1 300 ℃热处理之后
笼中OH
-
和H
-
浓度增加
笼子发生畸变
晶粒尺寸变大
样品的结晶性变好.通过在空气下热处理
减少了高能振动基团OH
-
的数目
进一步增强了近红外光发射.变温光致发光谱测量结果表明
C12A7 :
x
%Nd
3+
样品具有较高的热激活能
在红外激光器上有潜在的应用前景.
C12A7 :
x
%Nd
3+
powders with unique nanocaged structure were synthesized by self-propagating combustion method. Upon 808 nm excitation
we can observe three peaks at 887
1 069
1 340 nm attributed to the transition
4
F
3/2
4
I
J
/2
(
J
=9
11
13) of Nd
3+
respectively. When Nd
3+
mole fraction is 0.5%
the intense infrared luminescence can be obtained and no impurity phase is observed. After the annealing in H
2
ambient
the encaged OH
-
and H
-
concentrations and the grain size of C12A7 increase and the cages are distorted. The improvement of the crystallinity and the decrease of the non-radiative transition rate can enhance the near-infrared luminescence after the annealing in air. Based on the temperature-dependent emission spectra
the high thermal activation energies are obtained
indicating that C12A7 :
x
%Nd
3+
have potential applications in infrared laser.
C12A7Nd3+笼中阴离子红外发光
C12A7Nd3+encaged anioninfrared luminescence
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