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CaSnO3：Tb3+绿色长余辉荧光粉的制备与发光性质的研究
Preparation and Luminescent Properties of Green Long Lasting CaSnO3：Tb3+ Phosphor
- 发光学报 2013年34卷第1期 页码：30-34
- 作者机构：
大连海事大学 物理系, 辽宁 大连 116026
- 作者简介：
- 基金信息：国家自然科学基金(61078061,11104024,11104023)();中央高校基本科研业务费专项基金(2011TD017)资助项目()
DOI：10.3788/fgxb20133401.0030
中图分类号： O482.31纸质出版日期：2013-1-10，
收稿日期：2012-10-16，
修回日期：2012-11-18，
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梁左秋, 张金苏, 李香萍, 孙佳石, 程丽红, 仲海洋, 陈宝玖. CaSnO<sub>3</sub>：Tb<sup>3+</sup>绿色长余辉荧光粉的制备与发光性质的研究[J]. 发光学报, 2013,(1): 30-34
LIANG Zuo-qiu, ZHANG Jin-su, LI Xiang-ping, SUN Jia-shi, CHENG Li-hong, ZHONG Hai-yang, CHEN Bao-jiu. Preparation and Luminescent Properties of Green Long Lasting CaSnO<sub>3</sub>：Tb<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2013,(1): 30-34
梁左秋, 张金苏, 李香萍, 孙佳石, 程丽红, 仲海洋, 陈宝玖. CaSnO<sub>3</sub>：Tb<sup>3+</sup>绿色长余辉荧光粉的制备与发光性质的研究[J]. 发光学报, 2013,(1): 30-34 DOI： 10.3788/fgxb20133401.0030.
LIANG Zuo-qiu, ZHANG Jin-su, LI Xiang-ping, SUN Jia-shi, CHENG Li-hong, ZHONG Hai-yang, CHEN Bao-jiu. Preparation and Luminescent Properties of Green Long Lasting CaSnO<sub>3</sub>：Tb<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2013,(1): 30-34 DOI： 10.3788/fgxb20133401.0030.
摘要
采用高温固相法合成了CaSnO
3
:Tb
3+
绿色长余辉荧光粉。利用X射线衍射分析了CaSnO
3
:Tb
3+
物相结构。研究了Tb
3+
浓度对样品发光强度的影响
结果显示:随Tb
3+
浓度的增大
发射光谱强度先增大后减小
出现了浓度猝灭效应
Tb
3+
的最佳摩尔分数为0.3%。发射光谱由4个主要发射峰组成
峰中心分别位于492
546
588
623nm处
以Tb
3+
的
5
D
4
7
F
5
(546nm)跃迁发射为最强。对样品的温度特性进行了测量
通过对数据进行拟合得到样品的激活能为0.58eV
陷阱深度为0.622eV。最后
给出了CaSnO
3
:Tb
3+
绿色长余辉荧光粉可能的余辉发光机理。
Abstract
Green long lasting phosphors of CaSnO
3
:Tb
3+
have been successfully synthesized by solid-state reaction. The crystal structures of CaSnO
3
:Tb
3+
samples were analyzed by means of X-ray powder diffraction (XRD). The influence of Tb
3+
concentrations on the luminescent intensities was investigated. The results show that the intensities of the phosphors increase
and then decrease with the Tb
3+
ions concentration
which means there exist concentration quenching. The optimized mole fraction of Tb
3+
is 0.3%. The emission spectra display four main emission peaks
locating at 492
546
588 and 623 nm
respectively. The intensity of the emission peak originating from
5
D
4
7
F
5
transition is the strongest. By measuring the temperature character of the phosphors
the activation energy for thermal quenching process is 0.58 eV and the depth of trap is calculated to be 0.622 eV. Moreover
the possible mechanism of the green long lasting phosphorescence is proposed based on the experiment results.
关键词
CaSnO3：Tb3+长余辉陷阱深度
Keywords
CaSnO3：Tb3+long lasting phosphortrap depth
references
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