Single-phase white-emitting and tunable color phosphor Na3Sc2(PO4)3:Eu2+,Dy3+:Synthesis,luminescence and energy transfer
采用高温固相法合成了一系列Eu2+/Dy3+single doped and co-doped Na3SC2(PO 4)3荧光粉,并对其物相、morphology和发光性能进行了表征。在370nm的激发下,the Na3Sc2(PO4)3:Eu2+,Dy3+荧光粉可以发射白光,为什么光谱由一个以460nm为中心的宽发射带和其他三个峰组成,分别位于nmand672,respectively.There is energy transfer from Eu2+to Dy3+ionin Na3Sc2(PO4)3:Eu2+,以及,Dy 3+phosphor due to the good overlap between the emission spectrum of Na3Sc2(PO4)3:Eu2+and the excitation spectrum of Na3Sc2(PO4)3:Dy 3+,which is further confirmed by the fluorescence lifetime decrease of Eu2+离子随着Dy3+浓度的增加,能量传递过程是通过偶极-四极体相互作用进行的,这一点已被Dexter的理论所证实。通过增加Dy3+concentration,the color coordinates of the Na3Sc2(PO4)3:0.01Eu2+,xdy3+荧光粉可以从蓝色调整为白色,然后调整为黄色。Dy3+离子的最佳浓度为4。0mol%,beyond which the concentration quenching will take place.The Na3Sc2(PO4)3:Eu2+,Dy3+phosphor shows fairly good resistance to thermal quenching behavior,of which the emission intensity at423K可以维持初始值的90.3%(298 K),xDy3+ 荧光粉 有 潜在的 应用 像 这个 颜色可调 或 A. 单相的 白色 散发 荧光粉 在里面 白色 发光二极管。