Abstract
The full color greenish-white-emitting phosphors Eu 2+ -doped Sr 3 Bi(PO 4 ) 3 have been successfully synthesized by the conventional solid-state reaction, and its photoluminescence properties have been investigated for the first time. The emission spectra of Sr 3 Bi(PO 4 ) 3 ∶Eu 2+ phosphors exhibit a greenish-white-emitting by combining blue, green, and red emissions, which are originated from the 5d→4f transition of the Eu 2+ . The excitation spectra reveal broad strong bands from 300 to 400 nm, which match well with the readily available emissions from near-ultraviolet light-emitting diode (LED) chips. The correlated color temperature, color rendering index (CRI), and Commission Internationale de I’Eclairage chromaticity coordinates of the entitled phosphors excited by 330 and 365 nm are also investigated. The experimental results indicate that the Eu 2+ -doped Sr 3 Bi(PO 4 ) 3 phosphors are a promising innovative greenish-white-emitting phosphor for white LEDs.
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