用固相反应法合成了具有单相的Li2 EuSiO4结构的Li2 Sr1-x-ySiO4∶xCe3+,yTb3+系列样品.荧光光谱研究表明,Li2SrSiO4∶Ce3+发射很强的蓝光,最强的激发峰位于360 nm;而Li2SrSiO4∶Tb3+发射很强的绿光,最强的激发激发峰位于243 nm,但在350 ～410nm的激发非常微弱.在Ce3,Tb3+共掺杂的样品Li2 Sr0.99-ySiO4∶0.01Ce3+,yTb3+中,观察剑Ce3+对Tb3+的共振能量传递.由于Ce3+对Tb3+能量传递,Tb3+的激发光谱中出现360 nm附近的宽激发峰.控制Tb3+/Ce3+掺杂浓度比可以实现绿蓝双基色的调制.这种双基色的荧光粉有望在紫外激发的白光LED中获得应用.
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