Photoluminescence properties of Dy3+-doped oxyfluoride germanosilicate optical glass-ceramics

Abstract Dy 3+ -doped oxyfluoride germanosilicate glass and glass-ceramics were fabricated using a GeO 2 –SiO 2 –Al 2 O 3 –B 2 O 3 –BaO–BaF–Dy 2 O 3 system. Differential thermal analysis, X-ray diffraction, and photoluminescence spectra were carried out to study the effects of the concentration of F − ions and the heat treatment on structure and optical properties of the samples. The results showed that the glass has the strongest luminescence intensity when BaF 2 totally substitutes BaO. Moreover, Ba 3 AlF 9 nanocrystal was formed in the glass matrix after being heat treated at 560–600 °C for 2–8 h. The glass after heat treatment had stronger intensity of luminescence than the precursor glass. The intensity of luminescence reaches an optimum when it was heat treated at 580 °C for 4 h.