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通过高温固相合成工艺制备出白光LED用BaSi_2O_5∶Eu~(3+)红色荧光粉,通过X射线衍射、荧光光谱、紫外-可见光光谱仪对材料的晶格结构、发光特性和白光LED灯珠的光谱特性进行了测试。研究结果表明,Eu~(3+)的掺入没有改变基质的晶格结构,在Eu~(3+)掺杂浓度为5.0%(mol,摩尔分数)时,荧光粉的发射强度最高,最强激发峰为395nm,最强发射峰为614nm,通过结合紫光芯片和蓝黄荧光粉制备的白光LED灯珠,相关色温为4789K,显色指数为92,因此,BaSi2O5∶Eu~(3+)红色荧光粉是一种适合于紫光芯片应用的材料。
The BaSi_2O_5:Eu ~ (3+) red phosphor for white LED was prepared by high-temperature solid-phase synthesis. The crystal structure, luminescent properties and white LED lamp beads were characterized by X-ray diffraction, fluorescence spectroscopy and UV- Spectral characteristics were tested. The results show that the Eu 3+ doping does not change the lattice structure of the host, and the emission intensity of the phosphor is the highest at the Eu 3+ doping concentration of 5.0 mol% The strong excitation peak is 395nm and the strongest emission peak is 614nm. The white color LED lamp bead prepared by combining violet chip and blue-yellow phosphor has a correlated color temperature of 4789K and a color rendering index of 92. Therefore, BaSi2O5: Eu ~ (3+) Red phosphor is a suitable material for violet chip applications.