【作者】 王灵利； 倪海勇； 张秋红；

【Author】 Lingli Wang HaiyongNi Qiuhong Zhang {Guangzhou Institute of Non-Ferrous Metals,guangdong,guangzhou 510650,China)

【机构】 广州有色金属研究院；

【摘要】 本文采用高温固相法合成了白光LED用蓝绿色荧光粉BaSi₂N₂O₂:Eu²⁺。用X-射线粉末衍射（XRD）、光致发光（PL）等对荧光粉进行了表征。XRD结果表明,制备样品为较好的单相。PL结果表明,BaSi₂N₂O₂:Eu²⁺在390nm和460nm激发下均具有较高的发射强度,发射峰位于492nm附近。当Eu²⁺的掺杂浓度为4%时,可以获得最佳的样品发光强度。将荧光粉封装在紫外和蓝光芯片上制作了LED器件,测定了器件的电致发光光谱,色坐标等参数。更多还原

【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 the pure phase phosphors are obtained.The PL results demonstrate that the Eu²⁺ doped SrSi₂O₂N₂ phosphor shows efficient blue-green emission with peak at around 492 nm.The best emission can be obtained when the concentration of Eu²⁺ is 4%.The phosphors are encapsulated on the ultraviolet and blue chips,and LED devices are fabricated.The electroluminescence spectra and the CIE parameters are measured.更多还原