Effects of Pr3+ on Luminescence Performance and Energy Transfer Mechanisms in Ce3+-Doped High-Gadolinium Aluminoborosilicate Oxyfluoride Glass

However, in high-Gd-content scintillating glasses, cross-relaxation among Gd3+ ions limits energy transfer efficiency, thereby restricting further improvement of luminescence performance. In this study, High-temperature melting was employed to synthesize Pr3+ and Ce3+ co-doped gadolinium-rich boron-aluminosilicate oxyfluoride glass (Gd2O3-GdF3-B2O3-Al2O3-SiO2-CeO2, referred to as CS glass) under a reducing atmosphere (CO).

Using absorption, reflection, and luminescence spectroscopy, we systematically investigated the influence of Pr3+ doping on the optical and scintillation properties of Ce3+-doped scintillating glass, along with the energy transfer mechanisms among Pr3+, Ce3+, and Gd3+ rare-earth ions. The fluorescence intensity of this glass under X-ray excitation was compared with that of BGO crystal. Results demonstrate that low-concentration Pr3+ doping significantly enhances the luminescence intensity of CS glass excited at 275 nm, increasing the X-ray excited optical yield by 60%.