ChemInform Abstract: The Persistent Energy Transfer of Eu2+and Dy3+and Luminescence Properties of a New Cyan Afterglow Phosphor α-Ca3(PO4)2:Eu2+, Dy3+.

Abstract The long‐lasting phosphorescence (LLP) phosphor Ca 3 (PO 4 ) 2 :1%Eu 2+ ,1%Dy 3+ is prepared by calcination of a stoichiometric mixture of CaCO 3 , NH 4 H 2 PO 4 , Eu 2 O 3 , and Dy 2 O 3 in a 5%H 2 /N 2 reducing atmosphere (Al 2 O 3 crucible, 1480 °C, 4 h).