Li、Eu掺杂NaY(WO4)2荧光粉的合成与红色发光

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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100C。和已报道的燃烧法产物不同,Eu抖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393nm,发射光谱体现为高选择性的Eu抖的。Do-F2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
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