Glass Forming Ability and Luminescent Properties of P2O5-ZnO-SrO System Glasses

Glass-forming ability in the P2O5-ZnO-SrO-K2O system was investigated using differential thermal analyzer (DTA). The results showed that adding appropriate amount of K2O could improve the glass-forming ability of phosphate glasses. Meanwhile, the spectroscopic properties of Tm/Tb/Mn co-doped phosphate glasses were studied by photoluminescence (PL) measurements and CIE color coordinate. Blue, green, and reddish orange emission bands were observed in the PL spectra of the phosphate glasses. The combination of these emission bands gave white light by ultraviolet light excitation (360nm). As the Tb4O7 was increased,a gradual shift from white emission to yellow emission was observed in the PL spectra of the glasses. These three ions-doped phosphate glasses are potential candidates for white light-emitting diodes.