Luminescent Properties Research and Band Structure Calculations of Sr3 SiOs and Sr3 SiO5:Eu Phosphors

摘要：

　　Sr3 SiO5 and Sr3SiO5 : Eu phosphors are synthesized and their absorption spectra are measured.The absorption edge of Sr3SiO5is located at 257 nm and that of Sr3SiO5:Eu is at312 nm The electronic structures of Sr3SiO5 and Sr3SiO5: Eu have been calculated by density functional method with the local density approximation.A direct band gap of 4.82 eV is obtained for Sr3 SiO5.The calcu lated total and partial densities of states indicate that the top valence band of Sr3SiO5 is mainly construc ted from the O-2p state and the low conduction band mostly originates from Sr-4d states.With the doping of Eu2+, the energy gap decreases to 3.97 eV.

关键词： Sr3SiO5 electronic band structure optical properties

作者: Lingli Wang Haiyong Ni Qiuhong Zhang Fangming Xiao

作者单位: Institute of Rare Metals,Guangzhou Research Institute of Non-ferrous Metals,Guangzhou 510650,P.R.China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 18-22

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）