Effects of RE3+ (RE = La, Ce, Pr, Sm, Dy, Ho, Er, and Tm) on the luminescence of Sr2MgSiO5:Eu2+ phosphors

Abstract

Sr 2 MgSiO 5 :Eu 2+ phosphors were synthesized through a high temperature solid state reaction method. The phase and luminescence properties of the samples were characterized by X-ray diffraction (XRD) and a luminescence spectrometer. The effects of RE 3+ (RE = La, Ce, Pr, Sm, Dy, Ho, Er, and Tm) on the luminescent properties of the samples were studied. The results show that the luminescence spectrum of Sr 2 MgSiO 5 :Eu 2+ is a broad band composed of two emission peaks, at 460 and at 530 nm under near-ultraviolet excitation. Rare earth ions Re 3+ (RE = La, Ce, Pr, Sm, Dy, Ho, Er, and Tm) have great influence on the emission of Sr 2 MgSiO 5 :Eu 2+ phosphors. The La 3+ ion in Sr 2 MgSiO 5 :Eu 2+ phosphors greatly enhances the emission at 460 and 530 nm.

Changes of fluorescent spectral features after successive rare earth doping of gadolinium oxide powders

“…The search of the white light emitting diodes requires additional intensive search of materials possessing the good efficient luminescent features [1][2][3][4][5][6][7][8][9][10][11][12]. Some efforts were done concerning the Ce:YAG ceramics [6].…”