Eu2+/Dy3+共掺SrSiO3透明微晶玻璃的光学性质

在还原气氛中采用高温熔融法制备了Eu2+-Dy3+共掺硅酸盐玻璃,热处理后得到了Eu2+-Dy3+共掺透明SrSiO3微晶玻璃。测试了样品的激发光谱和发射光谱,研究了不同Eu2+-Dy3+物质的量比下微晶玻璃发光的变化并计算了对应的色坐标。研究发现,样品发射光谱范围在400～600nm,其中400～550nm(绿光)的宽发射谱带来自Eu2+的5d→4f跃迁,而位于483nm(蓝光)和575nm(黄光)的尖峰则来自Dy3+的4F9/2→6 H15/2和4F9/2→6 H13/2跃迁;在紫外(UV)光(365nm)激发下通过调控Eu2+-Dy3+物质的量比可得到发白光的微晶玻璃,当Eu2+-Dy3+物质的量比为1∶8时,Eu2+-Dy3+共掺SrSiO3透明微晶玻璃所发白光最佳,对应的色坐标(0.268,0.356)位于CIE标准色坐标图的白光区域且最接近理想白光。结果表明,Eu2+-Dy3+共掺SrSiO3透明微晶玻璃可作为一种潜在的白光发光二极管用基质材料。

Optical Properties of Eu2+-Dy3+ Co-Doped SrSiO3 Transparent Glass Ceramics

Eu2+-Dy3+ co-doped silicates glass was prepared by high temperature melting under reducing atmosphere. And the Eu2+-Dy 3+ co-doped SrSiO3 transparent glass ceramics are obtained after heat treatment. The samples′ excitation spectrum and emission spectrum are measured. The glass ceramics′ luminescence properties with different amount of substance ratio of Eu2+-Dy3+ are studied, and the corresponding chromaticity coordinates are calculated. A broad emission band region in 400~550 nm(green light) due to the 5d→4f transitions of Eu2+ is observed, as well as several sharp emission peaks at 483 nm (blue light) and 575 nm (yellow light) due to the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions of Dy3+. The ultraviolet light-emitting diode (UV-LED) excitable glass ceramics emitting white light are obtained by controlling the amount of substance ratio of Eu2+-Dy3+. When the amount of substance ratio of Eu2+-Dy3+ is 1∶8, the Eu2+-Dy3+ co-doped glass ceramics get the optimal white light emission and the corresponding chromaticity coordinate (0.268,0.356) exactly falls into the white light area of the CIE-1931 chromaticity diagram. The results indicate that the Eu2+-Dy3+ co-doped SrSiO3 transparent glass ceramics can be used as a potential matrix material for white light emitting diode.