纳米SrAl_2O_4∶Eu^(2+),Dy^(3+)长余辉发光材料的制备与性能  

Synthesis and Luminescence Properties of Long-Lasting Phosphor SrAl_2O_4:Eu^(2+),Dy^(3+) Nanoparticles

作　　者：肖琴[1] 肖丽媛[1] 刘应亮[1] 

机构地区：[1]暨南大学化学系纳米化学研究所,广州510632

出　　处：《无机化学学报》2010年第7期1240-1244,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50872045;20671042);广东省自然科学基金(No.05200555;7005918)资助项目

摘　　要：采用水热-均匀共沉淀法制备了纳米SrAl2O4:Eu2+,Dy3+长余辉发光材料。通过XRD、TEM、荧光光谱、热释光谱对其结构和性能进行分析。XRD结果表明所制备的SrAl2O4:Eu2+,Dy3+纳米发光材料为单相,属单斜晶系。TEM测试表明纳米SrAl2O4:Eu2+,Dy3+发光材料为规则的球状粒子,粒径为50~80nm,且分散性良好。激发和发射光谱测试表明,样品的激发光谱是峰值在356nm的连续宽带谱,发射光谱是峰值位于512nm的宽带谱,与SrAl2O4:Eu2+,Dy3+粗晶材料相比,激发和发射光谱都出现了"蓝移"现象。样品的热释光峰值位于358K,适合于产生长余辉。Long-lasting phosphor SrAl2O4：Eu2＋,Dy3＋ nanoparticles were synthesized by hydrothermal-homogeneous precipitation method.The products were characterized by XRD,TEM,photo-luminescence and thermo-luminescence spectroscopy.The results of XRD indicate that the obtained SrAl2O4：Eu2＋,Dy3＋ sample possesses pure phase and monoclinic crystal structure.The results of TEM reveal that the SrAl2O4：Eu2＋,Dy3＋nanoparticles are well-dispersed with particle size ranging from 50 to 80 nm.The excitation and emission spectra of SrAl2O4：Eu2＋,Dy3＋ sample are broad band spectra,and the main excitation peak is at 356 nm,the main emission is at 512 nm,which is blue shifted compared with SrAl2O4：Eu2＋,Dy3＋ coarse materials.The peak of the thermo-luminescence spectrum is at 358 K,which is suitable for the generation of long-lasting phosphorescence.

关 键 词：水热-均匀共沉淀法 SrAl2O4:Eu2+ Dy3+ 纳米粉体 长余辉发光 

分 类 号：O614.232[理学—无机化学] O614.31[理学—化学]