Photoluminescence properties of a novel red emitting Sr7Zr(PO4)6:Eu3+ phosphor

Abstract A novel red-emitting phosphor Sr 7 Zr(PO 4 ) 6 :Eu 3+ has been synthesised by a high-temperature solid-state reaction. X-ray powder diffraction (XRD) analysis and FT-IR spectra confirmed the phase formation of Sr 7 Zr(PO 4 ) 6 :Eu 3+ materials. The photoluminescence excitation and emission spectra, the concentration dependence of the emission intensity, decay curves, and ultraviolet–visible absorption spectroscopy of the phosphor were investigated. The results showed that the phosphor could be efficiently excited by the near ultraviolet (NUV) light region from 350 to 450 nm, and it exhibited red light emission. The decay time was also determined for various concentrations of Eu 3+ in Sr 7 Zr(PO 4 ) 6 . The calculated color coordinates lies in the red region. Therefore, these obtained results suggest that the prepared phosphors exhibit great potential for use as red emitting phosphor for near ultraviolet white light emitting diodes (NUV WLEDs).