Abstract
Eu2+-doped SrAl2O4 phosphors were synthesized using a solid-state reaction method. The structural and the luminescent properties of the phosphors were investigated by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and photoluminescence (PL) excitation and emission spectra. SrAl2O4:Eu2+ phosphors with H3BO3 showed a pure monoclinic phase and exhibited a broad green-emission band with a maximum at 520 nm. The luminescence of the phosphors originates from the transition of Eu2+ ions from the 4f65d1 excited state to the 4f7 ground state. These results indicate that SrAl2O4:Eu2+ phosphors exhibit potential applications as efficient green emitting phosphors for use in near-ultraviolet light-emitting diodes.
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