Investigation of a novel color tunable long afterglow phosphor KGaGeO4:Bi3+: luminescence properties and mechanism
Investigation of a novel color tunable long afterglow phosphor KGaGeO4:Bi3+: luminescence properties and mechanism
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新型可调色长余辉荧光粉KGaGeO4:Bi3的研究：发光特性和机理
DOI：
10.1039/c6tc04012h
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发表时间：
2017-02
影响因子：
6.4
通讯作者：
Chengyu Li
中科院分区：
文献类型：
--
作者：
Wenzhi Sun;Ran Pang;Huimin Li;Da Li;Lihong Jiang;Su Zhang;Jipeng Fu;Chengyu Li
虽然已经研究了各种Bi3+激活的常见发光材料，但到目前为止还没有发现几个Bi3+掺杂的长余辉发光材料。在本工作中，我们采用固相反应法制备了一种新型的长余辉材料KGaGeO4：Bi3+。这项工作的重点是观察到了KGaGeO4：Bi3+的亮青蓝可调长余辉。利用Rietveld精化技术对样品的结构信息进行了详细的研究。系统地研究了该荧光粉的光致发光和磷光性能。讨论了光致发光和磷光颜色可以调谐的原因。停止紫外线照射后，肉眼可在黑暗中观察到明亮的长余辉3小时。此外，通过热释光光谱研究了KGaGeO4：Bi3+中陷阱的性质，分析了KGaGeO4基质适合Bi3+产生余辉发射的原因。在这种荧光粉中，掺杂在K+位的Bi3+离子起到了发光中心的作用，而带负电荷的缺陷起到了空穴捕获的作用。根据实验结果，提出并讨论了KGaGeO4：Bi3+的一种可行的余辉机制。
Although a variety of Bi3+-activated common luminescent materials have been investigated, few Bi3+-doped long afterglow phosphors have been discovered up to now. In this work, we developed a novel long afterglow material KGaGeO4:Bi3+ by solid-state reaction. The highlight of this work is the observation of bright cyan to blue color tunable long afterglow of KGaGeO4:Bi3+. The structural information of the samples was studied in detail using Rietveld refinement. Photoluminescence and phosphorescence properties of the phosphor were investigated systematically. The reason why the photoluminescence and phosphorescence color can be tuned has been discussed. A bright long afterglow could be observed by the naked eye for 3 hours in the dark after ultraviolet irradiation was ceased. Moreover, we have analyzed the reason why the KGaGeO4 host is suitable for Bi3+ to generate afterglow emission by exploring the nature of traps in KGaGeO4:Bi3+ with the help of thermoluminescence spectra. In this phosphor, Bi3+ ions doped in K+ sites behave as luminescence centers, while negatively charged defects serve as hole-trapping centers. In view of the experimental results, a feasible afterglow mechanism of KGaGeO4:Bi3+ was also proposed and discussed.
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DOI：
10.3390/ma6072789
发表时间：
2013-07-12
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Van den Eeckhout K;Poelman D;Smet PF
通讯作者：
Smet PF
影响因子：
3.3
作者：
J. Barbier;M. Fleet
通讯作者：
J. Barbier;M. Fleet
DOI：
10.1524/zkri.1986.176.12.29
发表时间：
1986
期刊：
Zeitschrift für Kristallographie - Crystalline Materials
影响因子：
--
作者：
G. Lampert;R. Böhme
通讯作者：
G. Lampert;R. Böhme
影响因子：
4.6
作者：
Pengjiu Wang;Xuhui Xu;Dacheng Zhou;Xue Yu;J. Qiu
通讯作者：
Pengjiu Wang;Xuhui Xu;Dacheng Zhou;Xue Yu;J. Qiu
影响因子：
4.6
作者：
Jiao Xu;Zhenghua Ju;Xiuping Gao;Yanqing An;Xiaoliang Tang;Weisheng Liu
通讯作者：
Jiao Xu;Zhenghua Ju;Xiuping Gao;Yanqing An;Xiaoliang Tang;Weisheng Liu