以EDTA为螯合剂,采用络合沉淀法合成了纳米级Yb、Er共掺杂的Y2O3上转换发光粉.通过X射线衍射(XRD)、透射电子显微镜(TEM)、光致发光(PL)光谱和红外(IR)光谱对微晶进行了表征.结果表明,经980℃焙烧后的粒子为单一的立方晶相,其颗粒基本为球形,并且其粒径约为30nm.PL谱和IR谱分析结果表明:纳米粒子的表面效应使得表面原子更易吸附空气中的水和二氧化碳,从而增强了4S3/2→4F9/2的无辐射弛豫过程,使得样品所发红光与体材料相比具有更高的荧光分支比.另外,本文还对样品的发光性能作了详细的讨论.
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