陶瓷Issue(5)：19-27,9.
Sr2-xCaXSiO4:Eu2+,Dy3+(O≤x＜2)绿色长余辉发光材料的制备及发光性能
Preparation and Optical Properties of Eu2+ , Dy3+ Co-doped Sr2-xCaxSiO4 Green Long Persistent Phosphors via High-Temperature Solid State Reaction
夏昌奎 1雷芳 2施鹰 1肖维勤 1陆韬 1余爱民 1余剑峰2
作者信息
- 1. 上海大学材料科学与工程学院 上海200444
- 2. 杭州诺贝尔集团有限公司 杭州 311100
- 折叠
摘要
Abstract
Eu2+,Dy3+ co-doped Sr2-xCaxSiO4 ∶ Eu2+,Dy33+ (0≤x＜2) green long persistent phosphors were prepared by low temperature presintering and high temperature solid-state reaction routine in the H2 reduction atmosphere with stoichiometric and analytical reagent SrCO3,CaCO3,SiO2,Eu2O3 and Dy2O3 as raw materials.X-ray diffractometer (XRD) was used to characterize the crystallinity of the as-prepared samples.The results show that the main crystalline phase of the sample is α-Sr2SiO4,and the crystal structure is distorted with the increase of Ca2+ concentration.The excitation spectra and emission spectra of the samples were measured by fluorescence spectrometer.The results reveal that the Dy3+ can significantly improve the luminescent properties of the samples,and the optimum doping concentration is 0.04mo1％.The relationship between the thermoluminescence and the afterglow were analyzed by the thermoluminescence spectra and the decay curves.It indicates that Ca2+ doping can introduce new traps,and is conducive to the afterglow.When the doping concentration of Ca2+ is lower than 0.8％,the trap level resulting from the substitution of Sr2+ by Eu2+ plays the leading role in afterglow process;When the doping concentration of Ca2+ is higher than 0.8％,the trap level resulting from the substitution of Ca2+ by Eu2+ plays the leading role in afterglow process.关键词
Sr2-xCaxSiO4∶Eu2+/Dy3+/长余辉发光材料/高温固相反应法/光致发光/热释光Key words
Sr2-xCaxSiO4 ∶ Eu2+/Dy3+/Long persistent phosphors/High temperature solid-state reaction routine/Photoluminescence/Thermoluminescence分类
化学化工引用本文复制引用
夏昌奎,雷芳,施鹰,肖维勤,陆韬,余爱民,余剑峰..Sr2-xCaXSiO4:Eu2+,Dy3+(O≤x＜2)绿色长余辉发光材料的制备及发光性能[J].陶瓷,2017,(5):19-27,9.
