Synthesis and luminescence properties of SrAl_2O_4:Eu^(2+),Dy^(3+) hollow microspheres via a solvothermal co-precipitation method  

作　　者：薛志萍 邓苏青 刘应亮 雷炳富 肖勇 郑明涛 

机构地区：[1]Department of Chemistry,Jinan University [2]College of Science,South China Agricultural University

出　　处：《Journal of Rare Earths》2013年第3期241-246,共6页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China (21071063,21171071)

摘　　要：SrA1204：Eu2＋,Dy3＋ hollow microspheres were successfully prepared through a facile and mild solvothermal co-precipitation combining with a postcalcining process. The structure and particle morphology were investigated by X-ray diffxaction （XRD）, scanning and transmission electron microscopy （SEM and TEM） pictures, respectively. The mechanism for the formation of spherical SrAI204：Eu2＋,Dy3. phosphor was preliminary presented. After being irradiated with ultraviolet （UV） light, the spherical phosphor emitted long-lasting green phosphorescence. Both the photoluminescence （PL） spectra and luminance decay, compared with that of commercial bulky powders, revealed that the phosphors had efficient luminescent and long lasting properties. It was considered that the SrA1204：Eu2＋,Dy3. hollow microspheres had promising long-lasting phosphorescence with potential scale-dependent applications in photonic devices.SrA1204：Eu2＋,Dy3＋ hollow microspheres were successfully prepared through a facile and mild solvothermal co-precipitation combining with a postcalcining process. The structure and particle morphology were investigated by X-ray diffxaction （XRD）, scanning and transmission electron microscopy （SEM and TEM） pictures, respectively. The mechanism for the formation of spherical SrAI204：Eu2＋,Dy3. phosphor was preliminary presented. After being irradiated with ultraviolet （UV） light, the spherical phosphor emitted long-lasting green phosphorescence. Both the photoluminescence （PL） spectra and luminance decay, compared with that of commercial bulky powders, revealed that the phosphors had efficient luminescent and long lasting properties. It was considered that the SrA1204：Eu2＋,Dy3. hollow microspheres had promising long-lasting phosphorescence with potential scale-dependent applications in photonic devices.

关 键 词：2＋ 3＋SrA1204：Eu  Dy hollow mmrosphere LUMINESCENCE long-lasting phosphor rare earths 

分 类 号：O611.4[理学—无机化学]