文摘
Phosphate glasses doped with different concentrations of Ce3+ and Tb3+ were prepared by high temperature melting method. Effects of Tb3+ concentration and sensitization of Ce3+ on photoluminescence and radio-luminescence properties of terbium doped phosphate glass have been investigated by absorption, excitation and emission spectroscopy. Results showed the phosphate glass exhibit high broad absorption band attribute to the allowed 4f8–4f75d transition of Tb3+, which is beneficial for the 542 nm emission of Tb3+. It is found that the emission intensity of Tb3+ at 542 nm increased as the concentration of Tb3+ and Ce3+increasing. The suitable concentration of Ce3+ and Tb3+ in phosphate glass is 2 mol % and 10 mol % respectively, and the emission intensity of Ce3+/Tb3+-codoped phosphate glass at 542 nm shows 8 times stronger than that of the commercial Bi4Ge3O12 (BGO) crystal at 500 nm. The phosphate glass doped with Ce3+ and Tb3+ ions would be potential candidates for scintillating material for static X-ray imaging.