Influence of CaF2 addition on structure and luminescence properties of the Na2O–CaO–SiO2–Al2O3–ZnO–P2O5 glass co-doped with Ce3+/Yb3+

Abstract

Na2O–CaO–SiO2–Al2O3–ZnO–P2O5–CaF2 glasses co-doped with Ce3+/Yb3+ ions were obtained. The effects of added CaF2 on the glass structure, stability, and luminescence properties of the fluorosilicate glasses were studied. The research results show that the introduction of fluoride ions can reduce the crystallization peak temperature of the glass and increase the crystallization tendency of the glass. Structural analysis shows that the network breaking effect of F− ion is more obvious after CaF2 replaces CaO, and more glass network terminator sites are produced, raising the molar volume of the prepared glasses. The results of transmission spectra reveal that with the rise of CaF2 doping content, the UV cut-off wavelength appears blue-shift, which can be explained by the change of optical alkalinity of the prepared glass. Analysis of fluorescence performance shows that the intensity and inhomogeneous broadening of the emission peaks displays an increasing trend, which might be related to the decrease of glass phonon energy and the increase of rare-earth ion solubility. The above results indicate that the prepared Na2O–CaO–SiO2–Al2O3–ZnO–P2O5–CaF2 glasses co-doped with Ce3+/Yb3+ ions have potential applications for solar cells.