RED LIGHT-EMITTING AFTERGLOW PHOTOLUMINESCENCE PHOSPHOR AND AFTERGLOW LAMP USING THE PHOSPHOR

摘要

A red light emitting afterglow photoluminescence phosphor is a rare earth oxysulfide phosphor activated by Europium, which chemical formula is follows:Ln2O2S:Eux,My0.00001 ≤ x ≤ 0.50.00001 ≤ y ≤ 0.3    wherein Ln is at least one selected from the group consisting of Y, La, Gd and Lu; M is a coactivator which is at least one selected from the group consisting of Mg, Ti, Nb, Ta and Ga in the chemical formula.