Combinatorial Optimization of La, Ce-co-Doped Pyrosilicate Phosphors as Potential Scintillator Materials

摘要

A combinatorial,method was employed to rapidly screen the effects of La,Ce-co-doping on the luminescent properties of Gd-2:Si2O7 pyrosilicate using an 8 X 8 library. The candidate formulations (Gd1-x-yLax)(2)Si2O7:Ce-2y were evaluated by luminescence pictures under ultraviolet excitation: The optimal composition was found to :be (Gd0.89La0.1)(2)Si2O7:Ce-0.02 after scaled-up preparation and detailed characterization of powder samples, which shows an excellent light output under both;ultraviolet and X-ray excitation (about 5.43 tithes of commercial YAG:Ce powders). The XRD results indicate that the phase structure sequence is tetragonal-orthorhombic-triclinic for different calcination temperatures and doping ion. The (Gd0.89La0.1)(2)Si2O7:Ce-0.02 powder sample also demonstrated excellent temperature stability of Iuminescence up to 200 degrees C and a short decay the of several tens,Of nanoseconds, suggesting that thiS may represent a new kind of scintillation material, such as single crystals, ceramics, glass, or phosphors.