Enhancement of Luminescence Light Yield of Ln3+ Doped Glass By Oxyfluoride Glass Matrix

Glass is a good material which received attention for doping lanthanide ions. Glass doped Ln
³
+ ions can show luminescence, but not too strong light yield. It is well known that the host glass plays an important role in the enhancement. This paper has been described effect of Ln
³
+ ions (Sm
³
+, Eu
³⁺
and Dy
³⁺
) doped oxyfluoride glass by comparing between oxide and oxyfluoride glasses. For the Sm
³
+ doped gadolinium calcium phosphate oxyfluoride glass, the highest emission peak was 598 nm under 401 nm excitation. While the emission light yield of oxyfluoride glass was higher than oxide glass due to the reduction of phonon and non-radiative losses. In case of Eu
³⁺
doped oxyfluoride glass, the 612 nm emission under 394 nm excitation was observed. The light yield of oxyfluoride glass also was better than oxide glass. The Dy
³⁺
-doped phosphate oxide and oxyfluoride glasses were investigated. The luminescence light yield of oxyfluoride glass was more than oxide glass as well, owing to lower OH group of oxyfluoride glass, which can be confirmed by FTIR measurement. As described earlier, it concludes that the oxyfluoride glass is better than glass matrix when compared with oxide glass to enhance luminescence light yield for Ln
³
+ ions in glass matrix.