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; Yang Yunxia; Fang Bin; Chen Guorong

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2007

卷号：30

期号：4

起止页码：535

外文期刊名：OPTICAL MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000251499000006)】；

语种：英文

外文关键词：long afterglow; yttrium oxysulfide; dopant; phosphor

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. (c) 2007 Elsevier B.V. All rights reserved.