三维花状Sr_2MgSi_2O_7∶Eu^(2+)蓝色发光材料及其发光性能

Three-dimensional flower-like Sr_2MgSi_2O_7∶Eu^(2+) blue phosphor and its luminescence properties

采用溶胶-凝胶法,以葡萄糖为表面活性剂,成功地合成了三维花状的Sr2MgSi2O7∶Eu2+蓝色荧光粉。利用X射线衍射仪、扫描电镜、荧光光谱仪对产物的结构、形貌和发光性能进行了分析。结果表明,添加适量的葡萄糖对产物的结构无影响,但可改变产物的形貌和提高发光性能。当葡萄糖含量为0.03g/mL时,焙烧后的产物由无规则的块状形貌转变成颗粒形态为花瓣状的特征形貌。所得发光材料在355nm波长的紫外光激发下获得波长为469nm的明亮蓝光,而且发光强度最高。

Three-dimensional flower-like Sr2MgSi2O7∶Eu2＋ blue luminescent materials were successfully synthesized by sol-gel method with glucose as surfactants.The phase structure,morphologies and luminescence properties of Sr2MgSi2O7∶Eu2＋ were investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and photoluminescence spectroscopy（PL）.The results showed that the appropriate amount of glucose could change the morphologies of product and improved the luminescence properties,but had no pronounced effects on the structure of products.When the concentration of glucose was 0.03g/mL,shape of products changed from flakes or chunk to the obvious flower-like patterns at 1200℃ for 2h.The products emitted bright 469nm blue fluorescence when excited by 355 nm ultraviolet radiation,and the luminous intensity was the strongest.