Novel blue-emitting material, Eu2 +-doped Ca3SiO4Br2 was reported in this paper. Flaky crystals of Ca3SiO4Br2 were grown out of high-temperature Ca3SiO4/CaBr2 melts. The crystal structure was determined as the chemical composition of Ca3SiO4Br2, and structural investigations have also shown that Ca3SiO4Br2 is composed of the layers of calcium chloride and dicalcium silicate. Based on the photoluminescence analysis, Ca3SiO4Br2: Eu2+ phosphor exhibited a broad blue emission band of main peak at 470 nm under the near ultra-violet (n-UV)- light (300 -450 nm) , and efficient n-UV absorption property can be testified by UV-Vis diffuse reflectance spectra. It indicated that halosilicate materials Ca3SiO4Br2: Eu 2 + phosphor is an excellent phosphor in the application of the white LEDs.%制备了一种Eu2+掺杂的新型Ca3SiO4Br2蓝色发光材料,详细研究了其晶体结构组成.采用助熔剂法生长出Ca3SiO4Br2片状单晶,解析并证实该晶体为Ca3SiO4Br2,其结构基元中存在交替排列的Ca2SiO4和CaBr2层.荧光光谱测试表明:Ca3 SiO4Br2:Eu2+材料可被近紫外光( 300～ 430 nm)有效激发,产生较强的蓝光发射,发射主峰位于470 nm左右,样品的紫外-可见(UV-Vis)光谱进一步证实了其有效吸收近紫外光的特征.研究表明,卤硅酸盐基质的Ca3 SiO4 Br2:Eu2+材料是一种优良白光LED用蓝色荧光粉.
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