Trivalent rare earth activated SrCaA12O5 phosphor for white light-emtting diode

Abstract

Eu3+, Dy3+ activated SrCaAl2O5 phosphor were synthesized by the combustion method at 550oC. The prepared phosphor characterized by X-ray diffraction and photoluminescence measurements. The photoluminescence study of Eu3+ doped phosphor shows that the intensity of electric dipole transition (5D0→7F2) at 615nm dominates over that of magnetic dipole transition (5D0→7F1) at 596nm under 395nm excitation. The PL emission spectrum of Dy3+ ion at 350nm excitation gives an emission band at 484nm (blue) and 575nm (yellow). The optimum concentration of both the dopant having highest luminescence intensity is found to be 0.5 mole %. The obtained PL results indicated that prepared phosphor is suitable as near UV excited white light-emitting diodes. Copyright © 2013 VBRI press.