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The new phosphors Bi2ZnB2O7:Ln3+ (Ln3+=Eu3+,Dy3+) were synthesized by solid-state reaction technique.The obtained phosphors were investigated by means of X-ray powder diffraction (XRD),photoluminescence excitation and emission spectra with the aim of enhancing the fundamental knowledge about the luminescent properties of Eu3+ and Dy3+ ions in the Bi2ZnB2O7 host lattice.XRD analysis shows that all these compounds are of a single phase of Bi2ZnB2O7.The excitation and emission spectra of Bi2ZnB2O7:Ln3+ (Ln3+=Eu3+,Dy3+) at room temperature show the typical 4f-4f transitions of Eu3+ and Dy3+,respectively.The hypersensitive transitions of 5D0→7F2 (Eu3+) and 4F9/2→6H13/2 (Dy3+) are relatively higher than those of the insensitive transitions in Bi2ZnB2O7.It is conceivable that the Bi2ZnB2O7 structure provides asymmetry sites for activators (Eu3+,Dy3+).The optimum concentrations of Eu3+ and Dy3+ ions in Bi2ZnB2O7 phosphors are both x=0.05.
The new phosphors Bi2ZnB2O7: Ln3 + (Ln3 + = Eu3 +, Dy3 +) were synthesized by solid-state reaction technique. The resulting phosphors were investigated by means of X-ray powder diffraction (XRD), photoluminescence excitation and emission spectra with the aim of enhancing the fundamental knowledge about the luminescent properties of Eu3 + and Dy3 + ions in the Bi2ZnB2O7 host lattice. XRD analysis shows that all these compounds are of a single phase of Bi2ZnB2O7. The excitation and emission spectra of Bi2ZnB2O7: Ln3 + (Ln3 + = Eu3 +, Dy3 +) at room temperature show the typical 4f-4f transitions of Eu3 + and Dy3 +, respectively. The hypersensitive transitions of 5D0 → 7F2 (Eu3 +) and 4F9 / 2 → 6H13 / 2 (Dy3 +) are relatively higher than those of the insensitive transitions in Bi2ZnB2O7.It is conceivable that the Bi2ZnB2O7 structure provides asymmetry sites for activators (Eu3 +, Dy3 +). The optimum concentrations of Eu3 + and Dy3 + ions in Bi2ZnB2O7 phosphors are both x = 0.05.