中文摘要：

采用化学自燃烧方法制备了Eu^3＋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Eu^3＋的^5Do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。

英文摘要：

Nanosized Y2O3：Eu^3＋ powder samples with different content Ag^＋ ions were prepared by using chemical autocombustion. The fluorescent internal quantum efficiencies of 5Do level were estimated for the nanosized samples with Ag^＋ ions and compared with the pure Y2O3： Eu^3＋. It is found that Ag^＋-introduction led to an increase of 12% in quantum efficiency. The fluorescent intensity increased by 50%. The XRD, TEM and fluorescent spectra for all the samples were measured and discussed. It was discovered that Ag^＋ ions served as surface modifier for this nano-systern, and probably absorbed by the nanoparticle surface, so that the nonradiative probability could be reduced. Another influence came from the Ag^＋-introduction was the absorption enhancement of excitation light,in this case the excitation light could get into the luminescent centers, namely Eu^3＋ ions, more efficiently.