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采用化学共沉淀法制备了适合于紫外、近紫外、蓝光发光二极管(LED)激发的红色荧光粉SrMoO4:Eu3+.研究了样品的晶体结构和发光性质.结果表明:化学共沉淀法合成的SrMoO4:Eu3+荧光粉为四方纯相,其激发光谱包括一个宽带峰和一系列尖峰,峰值位于280nm(宽带峰中心),395nm,465nm,可以被紫外LED和蓝光LED有效激发.在395nm的激发下,测得发射光谱的强发射峰位于613nm,对应Eu3+离子的5D0→7F2跃迁.Eu3+离子掺杂浓度的改变对基质的晶格常数、Eu3+离子在晶体中对称性及发光性能有较大影响.通过对比不同掺杂浓度Eu3+离子的发射谱,发现在SrMoO4基质中Eu3+离子掺杂存在浓度猝灭现象,其最佳掺杂浓度为15%.
The red phosphor SrMoO4: Eu3 + which is suitable for ultraviolet, near-ultraviolet and blue light-emitting diode (LED) excitation was prepared by chemical coprecipitation method.The crystal structure and luminescent properties of the sample were investigated.The results show that SrMoO4: Eu3 phosphor is tetragonal pure phase, the excitation spectrum includes a broad band and a series of spikes, the peak is located at 280nm (broadband center), 395nm, 465nm, can be effectively activated by UV LED and blue LED. At 395nm excitation, measured The strong emission peak of the emission spectrum is located at 613nm, which corresponds to the 5D0 → 7F2 transition of Eu3 + ion.The change of Eu3 + ion doping concentration has a great influence on the lattice constant and the symmetry and luminescence properties of Eu3 + in the crystal. The emission spectra of Eu3 + ions with different doping concentrations show that there is a concentration quenching phenomenon in Eu3 + doping in SrMoO4 matrix, and the optimum doping concentration is 15%.