The roles of Eu2+ and Dy3+ in the blue long-lasting phosphor Sr2MgSi2O7: Eu2+, Dy3+

摘要: Abstract The luminescent properties of the undoped, Eu 2+ or Dy 3+ singly doped as well and codoped Sr 2 MgSi O 7 , were investigated using synchrotron radiation xenon mercury lamp excitation source. Under 172 nm excitation, besides emission band peaked at 465 nm from in :Eu there are evident lines 487 575 nm intraconfigurational 4f transitions . After UV peak temperatures thermoluminescence curves ∼65 °C for ∼120 °C : Afterglow spectra peaking increased with rising temperature 180 K to room temperature. results show that role is not only luminescence center, but also a trap center. On contrary, ions can be