Ce^(3+)and Dy^(3+)co-doped oxyfluoride glasses and glass ceramics containing CeF3 nanocrystals are prepared in a reducing atmosphere.XRD measurements and the calculated lattice parameters suggest that Dy^(3+)ions are ...Ce^(3+)and Dy^(3+)co-doped oxyfluoride glasses and glass ceramics containing CeF3 nanocrystals are prepared in a reducing atmosphere.XRD measurements and the calculated lattice parameters suggest that Dy^(3+)ions are incorporated with precipitated CeF3 nanocrystals along with a rise in the Dy^(3+)concentration or an increase in the annealing temperature.The glass ceramics emit white light close to the CIE coordinates of(0.3,0.3),derived from a combination of Ce^(3+)and Dy^(3+)emission.The CIE chromaticity coordinates of the Ce^(3+)and Dya+codoped glass ceramics can be tuned by varying the ratio of Ce^(3+)/Dy^(3+),while the luminescence intensity can be enhanced by heat treatment above 620℃.展开更多
基金Supported by the National Natural Science Foundation of China(No 50902120)the Research Fund of the Doctoral Program of Higher Education of China(No 20100101120025)+1 种基金Science and Technology Innovative Research Team of Zhejiang Province(No 2009 R50010)Program for Changjiang Scholars and Innovative Research Team in University.
文摘Ce^(3+)and Dy^(3+)co-doped oxyfluoride glasses and glass ceramics containing CeF3 nanocrystals are prepared in a reducing atmosphere.XRD measurements and the calculated lattice parameters suggest that Dy^(3+)ions are incorporated with precipitated CeF3 nanocrystals along with a rise in the Dy^(3+)concentration or an increase in the annealing temperature.The glass ceramics emit white light close to the CIE coordinates of(0.3,0.3),derived from a combination of Ce^(3+)and Dy^(3+)emission.The CIE chromaticity coordinates of the Ce^(3+)and Dya+codoped glass ceramics can be tuned by varying the ratio of Ce^(3+)/Dy^(3+),while the luminescence intensity can be enhanced by heat treatment above 620℃.
