采用溶胶-凝胶法,在空气环境中合成了蓝白色Sr2SiO4:Ce3+荧光材料,合成温度为900℃,这远低于田相法制备同类硅酸盐材料所需温度.X射线衍射图表明,所得样品主要为纯相Sr2SiO4晶体.由扫描电子显微镜图像可知,样品一次颗粒尺度在2 μm以下.处于254 nm紫外光激发下,样品发射光谱为峰值位于472 nm的不对称单峰宽带谱,是典型的蓝白光发射.监测472 nm发射峰,得到其激发谱为近紫外连续光谱峰值位于272 nm,321 nm.通过改变Ce3+浓度,进一步研究了参杂浓度对发光强度的影响.
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