The Preparation and Photoluminescence Properties of Fluorosilicate Glass Ceramics Containing CeF₃:Dy³⁺ Nanocrystals

Ce³⁺ and Dy³⁺ 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 Dy³⁺ ions are incorporated with precipitated CeF₃ nanocrystals along with a rise in the Dy³⁺ 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 Ce³⁺ and Dy³⁺ emission.The CIE chromaticity coordinates of the Ce³⁺ and Dy³⁺ co−doped glass ceramics can be tuned by varying the ratio of Ce³⁺/Dy³⁺, while the luminescence intensity can be enhanced by heat treatment above 620°C.