Eu/Tb共掺杂Y2O3荧光粉的发光性质研究

Luminescence properties of Eu/Tb activated Y2O3 phosphor for solid state lighting

摘要:

稀土掺杂荧光粉在固态照明中有良好的应用前景。这里用固相法合成了Y2O3:Eu3 ,Tb3 ，材料结构用X-射线衍射仪进行了表征，发现合成了纯相的Y2O3，掺杂的稀土离子未对基质结构产生影响。稀土离子单掺杂的Y2O3荧光粉在各自特征领域表现出良好的发光性质Y2O3:Tb3 发射出亮绿光，而Y2O3:Eu3 发射出亮红光颜色。调控它们的浓度，可以在Y2O3:0.2% Eu3 , 2%Tb3 处实现白光，详细分析了它们的发光光谱，计算了它们的色坐标，对应的CIE色坐标分别标记在色坐标图中。

Abstract:

Rare-earth doped phosphors with tunable optical properties have potential applications in solid state lighting such as display panels and fluorescent lamps. Herein, trivalent Eu3 , Tb3 activated Y2O3 phosphors have been successfully synthesized by solid state process. The structural studies have been performed by the measurements of X-ray diffraction profiles. The pure phase of Y2O3 is obtained and RE ions is not shown any effect on the structural properties. Single RE ions activated Y2O3 phosphors exhibit their characteristic emission. As Tb3 doped in Y2O3, a bright green emission is obtained and while Eu3 is introduced into the material Y2O3: Tb3 , the emission color can be adjusted to white light. The calculated CIE chromaticity coordinates of RE ions activated Y2O3 phosphors confirmed the green and white emissions.