论文部分内容阅读
采用低温燃烧法合成SrMgAl10O17:Eu2+及SrMgAl10O17:Eu2+,Er3+蓝色发光材料,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)和荧光光谱仪(PL)等测试手段对所得样品进行表征.XRD及SEM测试结果表明:利用低温燃烧法合成SrMgAl10O17材料具有较高的结晶度,且微量的稀土元素掺杂不会破坏其晶体结构;PL测试结果表明:SrMgAl10O17:Eu2+荧光粉在300—390 nm范围内可以被有效的激发,该波长范围与近紫外LED芯片匹配,发射光谱分布在430—520 nm之间,发射峰位于460 nm,属蓝光发射材料.共掺Er3+可显著增强SrMgAl10O17:Eu2+的发光强度,且当Er3+的掺杂浓度为4%时,样品的发光强度最大,较单掺Eu2+时样品的发光强度高出54.9%,表明Er3+对Eu2+的发光具有良好的敏化作用,该敏化作用的机理可以利用能量传递原理进行解释.
The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectroscopy (PL) The SEM results show that the SrMgAl10O17 material synthesized by low temperature combustion has a high degree of crystallinity and the rare earth element doping does not destroy its crystal structure. The PL test results show that SrMgAl10O17: Eu2 + phosphor has a high crystallinity in the range of 300-390 nm Which can be effectively excited, which is matched with the near ultraviolet LED chip, the emission spectrum is distributed between 430-520 nm and the emission peak is at 460 nm, which belongs to the blue light emitting material. Co-doping Er3 + can significantly enhance the luminescence of SrMgAl10O17: Eu2 + Intensity, and when the doping concentration of Er3 + is 4%, the luminescence intensity of the sample is the largest, which is 54.9% higher than that of the sample doped with Eu2 +, indicating that Er3 + has a good sensitizing effect on the luminescence of Eu2 + The mechanism of action can be explained by the principle of energy transfer.