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用共沉淀法制备了适合于近紫外激发的红色荧光粉掺铕钨酸锌锶[SrZn(WO_4)_2∶Eu~(3+)],通过X射线衍射、荧光光谱对样品的结构及发光性能进行了表征。XRD分析表明样品的主衍射峰与标准卡片(JCPDS 08-0490和JCPDS15-0774)的衍射峰基本一致,说明掺杂Eu~(3+)未改变基质晶格结构。在样品的激发光谱中,394nm为主激发峰,属于Eu~(3+)的f-f跃迁吸收。在波长为394nm的紫外激发下,样品发射主峰位于616nm,归属于Eu~(3+)的~5D_0→~7F_2跃迁。当Eu~(3+)掺量为7%(mol,摩尔分数)时,样品的发光强度达到最大。
The red phosphor SrTn (WO_4) _2: Eu ~ (3+)) doped with near-UV excitation was prepared by co-precipitation method. The structure and luminescent properties of the sample were characterized by X-ray diffraction and fluorescence spectroscopy Characterized. XRD analysis showed that the main diffraction peak of the sample is basically the same as that of the standard card (JCPDS 08-0490 and JCPDS15-0774), indicating that the doped Eu 3+ does not change the lattice structure of the matrix. In the excitation spectrum of the sample, 394 nm is the main excitation peak and belongs to the f-f transition absorption of Eu 3+. Under UV excitation with a wavelength of 394nm, the main emission peak of the sample is located at 616nm, belonging to the ~ 5D_0 → ~ 7F_2 transition of Eu ~ (3 +). When Eu ~ (3 +) content is 7% (mol, mole fraction), the luminescence intensity reaches the maximum.