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采用化学自燃烧方法制备了Eu3+掺杂的Y2O3纳米晶粉末材料,并在制备过程中引入了少量的Ag+离子.计算了Eu3+的5D0能级的发光的内量子效率,发现Ag+离子的加入可以使发光的量子效率最大增加12%.通过发射光谱的测量发现荧光最大可增强约50%,通过X射线衍射(XRD)、透射电子显微镜(TEM)、荧光激发和发射光谱研究证实Ag+离子的引入产生两个方面的作用:(1)是能够部分地消除表面的无辐射中心,使量子效率提高,发光增强;(2)是使激发光能够更有效地到达发光中心,提高激发效率,从而使荧光产额提高.

参考文献

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