Investigation on the luminescence properties of Eu~(3+)/Tb~(3+):Y_3Al_5O_(12) phosphors

摘要

Eu~(3+)/Tb~(3+) singly and co-doped Y_3Al_5O_(12) (YAG) phosphors were synthesized by the modified sol-gel method. The prepared phosphors were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscope (FE-SEM) and luminescence analysis. Cubic YAG formation was confirmed by XRD. A strong characteristic emission from Eu~(3+) and Tb~(3+) ions was identified and the influence of doping concentration was studied. Energy transfer mechanism was observed from Tb~(3+) to Eu~(3+) ions in the co-doped phosphor. The CIE co-ordinates cover orange-red to green with increasing the Tb~(3+)ion concentration.