Intense red-emitting Y_4Al_2O_9:Eu^3+phosphor with short decay time and high color purity for advanced plasma display panel

Abstract

A new phosphor Y(4)Al(2)O(9):Eu(3+) (YAM:Eu(3+)) emitting intense monochromatic red at 612 nm under vacuum ultraviolet (VUV) and ultraviolet (UV) excitations has been developed for application in next generation plasma display panels (PDPs). The developed phosphor has better luminescence efficiency, colour purity and shorter decay time than commercial (Y,Gd)BO(3):Eu(3+) red emitting PDP phosphor. High color purity (x = 0.67, y = 0.32) under VUV excitation with short decay time (1.03 msec) and excellent stability against degradation during PDP panel preparation suggest that YAM:Eu(3+) is a potential candidate for present and future PDPs. Surface coating by SiO(2) further improved phosphor characteristics.