用高温固相法制备了Al3+掺杂的YVO4:Eu3+荧光粉.采用X射线粉末衍射(XRD)、环境扫描电镜(SEM)、荧光光谱(FL)等对样品进行了表征.分析了Al3+掺杂对YVO4:Eu样品晶体结构、晶胞参数和荧光性能的影响,并探讨了烧结温度对光谱性能的影响.研究结果表明:当Eu3+的浓度x(摩尔百分比)为4％,Al3+的浓度为1.5％时,在1100℃下烧结的样品其荧光性能最好,5 D0→7F2处的发光强度约为未掺Al3+的2.5倍.由于Eu3+的7 F2→5L6跃迁吸收,YVO4:Eu3+,Al3+荧光粉可在395 nm被有效激发.因此,YVO4:Eu3+,Al3+可以作为近紫外激发的白光LED红色荧光粉.
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