文献类型：期刊文献

英文题名：Effects of doping ions on afterglow properties of Y2O2S:Eu phosphors

作者：Yuan, Shuanglong[1]; Yang, Yunxia[1]; Fang, Bin[1]; Chen, Guorong[1]

机构：[1] School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China

年份：2007

卷号：30

期号：4

起止页码：535

外文期刊名：Optical Materials

收录：EI(收录号：20074410902951)

语种：英文

外文关键词：Crystal structure - Doping (additives) - Phosphors - Photoluminescence - Positive ions - Thermoluminescence

摘要：In this paper, Y2O2S:Eu phosphors doped with Mg2+, Ca2+, Sr2+, Ba2+, Ti4+ were studied by photoluminescent spectra, afterglow spectra, XRD, decay curve, relative brightness and thermoluminescent spectra. The results show that those dopants do not change crystal structure of the host, but influence afterglow properties and relative brightness. Decay curve comprised of a fast and a slow part was found well exponential. It is considered that presence of shallow trap levels induced by interstitial oxygen atoms is responsible for the fast decay process while the deeper traps control the slow decay behavior. ? 2007 Elsevier B.V. All rights reserved.