Abstract
The oxonitride blue-green phosphor BaSi2O2N2∶Eu2+ has been prepared by solid state reaction.The prepared BaSi2O2N2∶Eu2+ phosphors are characterized by X-ray powder diffraction(XRD),photoluminescence(PL),etc.The XRD results show that pure phase phosphors are obtained.The PL results demonstrate that BaSi2O2N2∶Eu2+ shows high efficient emission with peak at around 492 nm.The best emission can be obtained with the Eu2+ mole fraction of 4%.The phosphors are encapsulated on the ultraviolet and blue chips,high blue-green luminescence is obtained in both devices,and the CIE parameters are(0.092 0,0.428 2) and(0.112 9,0.223 0),respectively.
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