SrAl_(2)Si_(2)O_(8):Eu^(3+/2+)荧光粉制备工艺优化及发光性能提升的研究

Study on Optimization of Preparation Process and Enhancement of Luminescence Performance of SrSrAl_(2)Si_(2)O_(8):Eu^(3+/2+) phosphor

采用高温固相法制备了不同浓度Eu掺杂的SrAl_(2)Si_(2)O_(8)的样品,探究了适合此基质的助溶剂种类及用量。利用X射线衍射对样品进行结构表征,使用荧光光谱仪对样品的发光性能进行了分析。在硼酸及Li_(2)CO_(3)中,选择硼酸为适合此基质的助溶剂。对样品的助溶剂所掺杂量进行探究,发现当助溶剂的掺杂为9wt%时,此基质的发光性能最优异。同时在当Eu^(2+)的掺杂浓度为0.04mol时发光强度达到最佳,样品在氧化气氛下出现了自还原现象。通过增加加入Ba^(2+)浓度,提升其Eu^(2+)的发光性能,最高发射峰出现红移,提高SrAl_(2)Si_(2)O_(8)自还原现象,且在Ba^(2+)掺杂为0.4mol,发光强度达到最高。

Samples of different concentrations of Eu-doped SrAl_(2)Si_(2)O_(8) were prepared by high-temperature solid-phase method.The types and dosages of cosolvents suitable for this matrix were investigated.The samples were characterized by X-ray diffraction,and the luminescence properties of the samples were analyzed using a fluorescence spectrometer.In boric acid and Li_(2)CO_(3),boric acid is selected as a co-solvent suitable for the matrix.The doping amount of the co-solvent of the sample was investigated,and it was found that when the doping of the co-solvent was 9 wt%,the luminescence property of the substrate was the most excellent.At the same time,when the doping concentration of Eu^(2+) is 0.04 mol,the luminescence intensity is optimal,and the sample exhibits self-reduction under oxidizing atmosphere.By increasing the concentration of Ba^(2+),the luminescence properties of Eu^(2+) were improved,and the highest emission peak appeared red shift,which improved the self-reduction phenomenon of SrAl_(2)Si_(2)O_(8),and the Ba^(2+) doping was 0.4 mol,and the luminescence intensity reached the highest.