Author/Authors :
Shuo CUI، نويسنده , , Daliang ZHAO، نويسنده , , Huang Jinglu، نويسنده , , Hengyi FU، نويسنده , , Jiangyun QIAN، نويسنده , , Qun LUO، نويسنده , , Qiao Xusheng، نويسنده , , Xianping Fan، نويسنده , , Xianghua Zhang، نويسنده ,
Abstract :
The Ce3+and Dy3+ co-doped fluorosilicate glass and glass ceramics containing SrF2 or CeF3 nanocrystals were prepared under reducing atmosphere. The precipitated nano-crystalline phase shifted from cubic SrF2 to hexagonal CeF3 gradually with the heat treatment temperature increasing from 620 to 680 °C. The glass and glass ceramics emitted white light, deriving from a combination of the Ce3+ blue and the Dy3+ yellow light. The CIE coordinates could be tuned by adjusting the ratio of Ce3+/Dy3+ concentration. The luminescence could be enhanced significantly by annealing the samples at the temperatures lower than 640 °C.
Keywords :
rare earths , Ce3+ , white light emitting , Dy3+ , nanocrytals , Glass ceramics
