Eu2+-doped Li2CaSiO4 bluish green phosphors matched well with UV and blue LED were prepared by the microwave assited method. The synthesized products were characterized by XRD、SEM and PLE/PL spectroscopy. The results of XRD matched well with PDF#27-290. SEM images showed that the products had a diameter from 2 to 5 μm. When excited by ultraviolet and blue light, the main emission peak of Li2CaSiO4:1％Eu2+ located at 478 nm corresponding to the t2g→8S7/2 transition of Eu2+, and peak width at half height was 31 nm.The luminescent properties were investigated as a function of activator (Eu2+) concentration and the critical concentration was found to be 1％. The color coordination of Li2CaSiO4:1％Eu2+was (0.09, 0.24),so they were suitable as bluish green phosphors for white LEDs due to their excellent excitation profile and chromaticity.%采用微波辅助法合成了蓝-绿色荧光粉Li2CaSi04:Eu2+,该荧光粉能很好的与紫外光及蓝光LED匹配.分别采用X射线衍射(XRD)、扫描电镜(SEM)和激发一发射光谱(PLE/PL)对样品进行了表征.X射线衍射数据与标准卡片PDF#27-290很好吻合.扫描电镜测试表明样品粒径在2-5μm.在紫外光和蓝光激发下,Li2CaSiO4:1%Eu2+发射主峰位于478 nm.对应于Eu2+的t2g→8S7/2电子跃迁.半高峰宽31 am.样品发光性能与Eu2+掺杂浓度有关,且Eu2+的最佳掺杂浓度为1%.合成的样品色坐标为(0.09,0.24),可作为白光LED用蓝-绿色荧光材料.
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