Guan Anxiang, Yao Chunying, Wang Guofang, Fu Anjie, Zhou Liya, Meng Yingbin, Wang Qiuping
School of Chemistry and Chemical Engineering, Guangxi University, Nanning, People's Republic of China.
Luminescence. 2017 Jun;32(4):529-534. doi: 10.1002/bio.3208. Epub 2016 Sep 15.
A series of Ce ,Mn -coactivated Ca YNa(PO ) F phosphors were synthesized via a traditional solid-state reaction under a reductive atmosphere. X-Ray powder diffraction was used to confirm that the crystal structure and diffraction peaks of Ce /Mn -doped samples matched well with the standard data. A spectral overlap between the emission band of Ce and the excitation band of Mn suggested the occurrence of energy transfer from Ce to Mn . With increasing Mn content, the emission intensities and lifetime values of the Ce emission for Ca YNa(PO ) F:Ce ,Mn phosphors linearly decrease, whereas the energy transfer efficiencies gradually increase to 89.35%. By adjusting the relative concentrations of Ce and Mn , the emission hues are tuned from blue to white and eventually to yellow. These results suggest that Ca YNa(PO ) F:Ce ,Mn phosphors have promising application as white-emitting phosphors for near-ultraviolet light-emitting diodes.
通过传统的固态反应在还原气氛下合成了一系列铈、锰共激活的CaYNa(PO₄)F荧光粉。利用X射线粉末衍射证实了铈/锰掺杂样品的晶体结构和衍射峰与标准数据匹配良好。铈发射带与锰激发带之间的光谱重叠表明发生了从铈到锰的能量转移。随着锰含量的增加，CaYNa(PO₄)F:Ce,Mn荧光粉中铈发射的发光强度和寿命值呈线性下降，而能量转移效率逐渐增加至89.35%。通过调节铈和锰的相对浓度，发射色调从蓝色调至白色，最终变为黄色。这些结果表明CaYNa(PO₄)F:Ce,Mn荧光粉作为近紫外发光二极管的白色发光荧光粉具有广阔的应用前景。
