Effect of Retrapping on the Persistent Luminescence in Strontium Silicate Orange—Yellow Phosphor.

A series of Sr3-x-1.5ySiO5:xEu2+, yLn3+ (Ln: Nd, Er, Dy, x = 0.0025, y = 0.0025) is prepared by solid state reaction of a stoichiometric mixture of SrCO3, SiO2, Eu2O3, and Ln2O3 (alumina crucible, 1400 °C, 4 h, N2 atmosphere).