Preparation of Red-emitting Europium(III) doped SrAl_2B_2O_7 Phosphors and Investigation of Luminescent Properties

摘要

Red-emitting Europium(III) doped SrAl_2B_2O_7 phosphors have been prepared by precipitation method, and its luminescent properties under UV excitation have been investigated. The phosphors are characterized by X-ray diffraction (XRD) and photoluminescence spectra. The SrAl_2B_2O_7:Eu~(3+) phosphors can be obtained at 900°C by calcining precipitation precursor. These phosphors can be effectively excited by UV light at 394nm. In emission spectra, the strongest peak at 618 nm correlating to red emission is due to the electric dipole transition ~5D_0→~7F_2 of Eu~(3+) ions. The luminescent properties of SrAl_2B_2O_7:Eu~(3+) phosphors with 8 mol% doping concentration of Eu~(3+) are optimal.