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Li2ZnSiO4∶Eu3+红色荧光粉的制备及其发光性能

DOI: 10.7521/j.issn.0454-5648.2014.03.08

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Abstract:

采用溶胶-凝胶法合成了适合于近紫外激发的Li2ZnSiO4∶Eu3+红色荧光粉,用X射线衍射、红外光谱和荧光光谱对样品进行了结构及发光性能表征。结果表明合成样品为四方晶相Li2ZnSiO4晶体。样品的激发光谱由O2-→Eu3+电荷迁移带和Eu3+的离子特征激发峰组成。在波长为395nm的紫外激发下样品发射红光,发射主峰位于613nm,对应于Eu3+离子的5D0→7F2跃迁。随着Eu3+掺杂量的增加,其发光强度先增加后减小,Eu3+的最佳摩尔掺量为3.5%。

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