碱金属离子共掺Sr3Ga2Ge4O14∶Dy3+发光性能研究

被引：0
|
作者：
白鑫 [1 ]
杨伟斌 [1 ]
熊飞兵 [1 ]
李明明 [1 ]
胡正开 [1 ]
郭益升 [1 ]
傅兴宇 [2 ]
机构：
[1] 厦门理工学院光电与通信工程学院
[2] 厦门理工学院计算机与信息工程学院
来源：
人工晶体学报 | 2024年 / 53卷 / 01期
关键词：
Sr3-xGa2Ge4O14∶xDy3+; 高温固相法; 电荷补偿剂; 光致发光; 热稳定性; 荧光寿命;
D O I：
10.16553/j.cnki.issn1000-985x.20231011.013
中图分类号：
O482.31 [发光学]; TQ422 [光化学物质];
学科分类号：
摘要：
本文采用高温固相法制备了一系列新型Sr3-xGa2Ge4O14∶xDy3+（x=0～0.40）(摩尔分数)及Sr2.68Ga2Ge4O14∶0.16Dy3+,0.16M+（M=Li、Na、K）荧光粉。EDS能谱分析证实该荧光粉中存在Sr、Ga、Ge、O、Dy元素。系列Sr3-xGa2Ge4O14∶xDy3+在350 nm光激发下产生了以568 nm为主波长，对应于4F9/2→6H13/2跃迁的强黄光发射。荧光粉的发射光谱显示，其发射强度随Dy3+浓度的增加而变化，且当x=0.16时达到最强。共掺杂碱金属M（M=Li、Na、K）作为电荷补偿离子，其中Li+对增加Dy3+的发射强度效果最明显，使得荧光粉的发射强度提高到没有电荷补偿离子时的2倍。此外，随着Dy3+掺杂浓度的提高，荧光粉的荧光寿命不断减少。最后探讨了荧光粉Sr2.68Ga2Ge4O14∶0.16Dy3+,0.16Li+的CIE色度坐标和热稳定性，其CIE色度坐标为（0.371 9,0.404 6）,位于黄色区域，在453 K的发光强度约为其室温发光强度的95.5%。因此，Dy3+,Li+共掺杂Sr3-xGa2Ge4O14荧光粉是潜在的显示器件和白光LED器件候选材料。
引用
收藏
页码：97 / 106
页数：10
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