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采用微乳液法合成了Y2 SiO5∶Eu3+系列荧光粉.利用XRD、扫描电镜(SEM)、光电子能谱(EDS)、荧光光谱、色坐标等研究了所制备荧光粉的结构、形貌和发光性能.光电子能谱数据验证了合成样品的离子掺杂量.荧光光谱测试表明,Y2SiO5∶Eu3监测光谱呈现200nm~ 300nm的宽带吸收峰和Eu3+的系列吸收峰.在253nm紫外光激发下,Y2SiO5∶Eu3材料的发射光谱为一个多峰谱,主峰分别为5D0→7F1(591nm)、5D0→7F2 (616nm)的发光峰.当Eu3+掺杂物质的量大于24%时,出现了浓度猝灭现象.通过色坐标图可知,当Eu3+掺杂量为24%时,荧光粉的色坐标(0.503,0.366)与标准的红光色坐标接近,表明Y2SiO5∶Eu3+是很好的近紫外光激发下的红色荧光粉.

参考文献

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