Thermally stable luminescence of KSrPO_4:Eu~(2+) phosphor for white light UV light-emitting diodes

摘要

A novel blue phosphor based on phosphate host matrix, KSrPO_4 doped with Eu~(2+), was prepared by solid state reaction. The phosphor invariably emits blue luminescence with a peak wavelength at 424 nm under ultraviolet excitation at 360 nm. Eu~(2+)-doped KSrPO_4 phosphors show higher thermally stable luminescence which was found to be better than commercially available Y_3Al_5O_(12):Ce~(3+) phosphor at temperature higher than 225℃.