纳米CuO对SrAl_2O_4∶Eu^(2+),Dy^(3+)长余辉荧光材料的光学性能影响

Influence of Nano-CuO on Optical Performance of SrAl_2O_4:Eu^(2+), Dy^(3+) Long-Lasting Fluorescent Material

以SrAl_2O_4为基质,一定浓度的Eu^(2+)离子和Dy^(3+)离子为激活离子,通过在基质材料中添加不同比例的纳米CuO,采用传统高温固相反应法制备出具有一定长余辉效果的荧光材料,并详细研究了纳米氧化铜含量对SrAl_2O_4荧光材料的光学性能影响。借助X-射线衍射仪分析制备样品的物相及纯度;通过扫描电子显微镜表征样品的显微形貌变化;采用荧光光谱仪分析样品的光致发光性能。结果显示:利用该方法烧制的荧光粉末其物相主要为SrAl_2O_4;添加纳米氧化铜的荧光样品的颗粒与对照组相比结晶程度更高且晶界明显;在添加纳米氧化铜的各组样品均呈现Eu^(2+)对应的绿光发射;伴随纳米氧化铜添加量的增加,其荧光强度先升后降。

Using SrAl_2O_4 as substrate and Eu^（2＋） and Dy^（3＋） ions as activating ions,a series of fluorescent materials with a certain long-lasting effect were prepared by the traditional high-temperature solid-state reaction method by adding different ratios of nano-CuO in the matrix material.The influence of adding nano-CuO on optical performance of SrAl_2O_4：Eu^（2＋）,Dy^（3＋） has been studied in detail.The phase and purity of samples were studied by use of X-ray diffraction.The micro-structural changes of the samples were characterized by scanning electron microscopy.The photo-luminescence properties of the samples were analyzed by fluorescence spectroscopy.The results show that the phase of the powder prepared by this method is mainly SrAl_2O_4.Compared with the control group,the crystallization and the grain boundary of the fluorescent samples with nano-CuO added were higher.The green light emission of Eu^（2＋）was observed in the samples added with nano-CuO.With the increase of nano-CuO addition,the fluorescence intensity of the sample first increased and then decreased.