Studies on long lasting optical properties of Eu2+ and Dy3+ doped di-barium magnesium silicate phosphors

被引:0
作者
Ravi Shrivastava [1 ]
Jagjeet Kaur [1 ]
机构
[1] Govt.VYT PG Autonomous College
关键词
Phosphorescence; XRD; Persistence luminescence; Trapping center;
D O I
暂无
中图分类号
TQ422 [光化学物质];
学科分类号
0817 ;
摘要
Di-barium magnesium silicate phosphors doped with europium and dysprosium were prepared under a weak reducing atmosphere.X-ray diffraction pattern of the sample was also done that confirmed the proper preparation of the phosphor.Scanning electron microscope(SEM) images confirmed that the sample has regular surface and uniform grain size distribution.Comparative studies of phosphorescence decay of BaMgSiO:Eu,Dyphosphors with different concentration of Dywere done.The phosphor with 0.5/1.5 mol%of Eu/Dy,exhibited optimum green color afterglow properties.This emission is expected to arise due to transition of Euions from any of the sublevels of 4f~65d~1configuration to ~8Slevel of the 4f7 configuration.For a suitable trap depth,the trap concentration is expected to be proportional to the concentration of Dy.These traps are responsible for holding the charge career for a reasonable time,subsequently for increasing the time of afterglow.Hence,optimum Dy3* concentration produces the longer afterglow duration with higher intensity of luminescence signals.Trap depth were also calculated using thermoluminescence glow curve which was indicative of formation of traps suitable for long afterglow.
引用
收藏
页码:1187 / 1190
页数:4
相关论文
共 7 条
  • [1] Photoluminescence and Thermoluminescence Investigation of Europium- and Dysprosium-Doped Dibarium Magnesium Silicate Phosphor
    Shrivastava, Ravi
    Kaur, Jagjeet
    Dubey, Vikas
    Jaykumar, Beena
    Loreti, Stefano
    [J]. SPECTROSCOPY LETTERS, 2015, 48 (03) : 179 - 183
  • [2] Giant Improvement on the Afterglow of Sr 4 Al 14 O 25 :Eu 2+ ,Dy 3+ Phosphor by Systematic Investigation on Various Parameters[J] . Hom Nath Luitel,Takanori Watari,Rumi Chand,Toshio Torikai,Mitsunori Yada,Necmettin Mara?l?.Journal of Materials . 2013
  • [3] Investigation of the trap state of Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ phosphor and decay process[J] . Haoyi Wu,Yihua Hu,Xiaojuan Wang.Radiation Measurements . 2011 (6)
  • [4] X-ray absorption study of rare earth ions in Sr 2 MgSi 2 O 7 :Eu 2+ ,R 3+ persistent luminescence materials[J] . Optical Materials . 2009 (12)
  • [5] On the phosphorescence mechanism in SrAl 2 O 4 :Eu 2+ and its codoped derivatives[J] . Frédéric Clabau,Xavier Rocquefelte,Stéphane Jobic,Philippe Deniard,Myung-Hwan Whangbo,Alain Garcia,Thierry Le Mercier.Solid State Sciences . 2007 (7)
  • [6] Persistent luminescence of Ba 2 MgSi 2 O 7 :Eu 2+[J] . Journal of Luminescence . 2006
  • [7] The roles of Eu 2+ and Dy 3+ in the blue long-lasting phosphor Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+[J] . Chaoshu Shi,Yibing Fu,Bo Liu,Guobin Zhang,Yonghu Chen,Zeming Qi,Xixian Luo.Journal of Luminescence . 2006