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 ran. 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.%采用高温固相法合成了白光LED用蓝绿色荧光材料BaSi2N2O2∶Eu2+.用X射线衍射(XRD)、光致发光(PL)等对荧光材料进行了表征.XRD结果表明,所制备的样品为较好的单相.BaSi2N2 O2∶Eu2+在395 nm和460nm激发下均具有较高的发射强度,发射峰位于492 nm附近.当Eu2+的摩尔分数为4％时,可以获得最佳的样品发光强度.将荧光材料封装在紫外和蓝光芯片上制作了LED器件,两种器件均发射出强的蓝绿色荧光,色坐标分别为(0.092 0,0.428 2)和(0.112 9,0.223 0).
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