Quenching Study on iron impurity in Eu2+, Dy3+ Doped Strontium Aluminate Phosphor Prepared by Nano-Coating Process

摘要：

A series of long afterglow phosphors, Eu<2+>, Dy<3 +>, with different iron content were prepared by nano-coating process. The resulted precursors were characterized by Transmission Electron Microscope (TEM), which suggested that the precursor particles had nanometer size distribution. The optical quenching of iron impurity on the phosphor powders were investigated by X-Ray powder Diffraction (XRD) and photoluminescence methods. The XRD indicates that a pure monoclinic SrAl<,2>O<,4>: Eu<2+>, Dy<3+> was formed at 1200℃ and iron impurity up to 296.36× 10<- 4>％ had no effect on the SrAl<,2>O<,4>: Eu<2+>, Dy<3+> phase structure. However, the luminescence intensity were strongly dependent on the trace iron impurity, which might be explained that iron displace the aluminium and form Fe-O bond, which competed energy with Eu<2+> and transfer red them to infrared sites.

关键词： long afterglow phosphor SrAl<,2>O<,4>: Eu<2+>, Dy<3+> iron impurity quenching rare earths

作者: Yang Xuefeng(杨雪峰) Ning Guiling (宁桂玲) Liu Jie (刘杰) Pan Wen (潘文) Lin Yuan (林源)

作者单位: State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China

会议类型: 国际会议

会议名称: 第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)

会议地点: 包头

会议语种:英文

页码: 326-329

在线出版日期: 2007-08-07（万方平台首次上网日期，不代表论文的发表时间）