利用固相法合成了Li+、Eu3+掺杂的NaY(WO4)2红色荧光粉,并且用X射线粉末衍射仪和紫外-可见光谱仪进行了表征.研究发现纯相产物可以在1100℃下制备,然而稳定存在的温度区间仅约100℃.和已报道的燃烧法产物不同,Eu3+掺杂产物的发光性质证实了浓度猝灭现象的存在,掺杂9m01％时发光最强,有效激发波长是393 nm,发射光谱体现为高选择性的Eu3+的5D0→7F2电偶极跃迁,因此适合于解决白光LED中缺乏红光成分的问题.Li+掺杂既没有改变Eu3+红光发射的择优性,又能够调节发光强度.研究发现合适的Li+浓度可以增强发光,但是浓度过大或过小对发光不利,掺杂30mo1％时发光最强.这种变化规律可以归因于点阵缺陷增加和Y原子格位不对称性增强对发光强度的不同影响之间竞争的结果.
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