title: Combinatorial optimization of La, Ce-co-doped pyrosilicate phosphors as potential scintillator materials.
abstract: A combinatorial method was employed to rapidly screen the effects of La, Ce-co-doping on the luminescent properties of Gd2Si2O7 pyrosilicate using an 8 × 8 library. The candidate formulations (Gd1-x-yLax)2Si2O7:Ce2y were evaluated by luminescence pictures under ultraviolet excitation. The optimal composition was found to be (Gd0.89La0.1)2Si2O7:Ce0.02 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 times of commercial YAG:Ce powders). The XRD results indicate that the phase structure sequence is tetragonal-orthorhombic-triclinic for different calcination temperatures and doping ions. The (Gd0.89La0.1)2Si2O7:Ce0.02 powder sample also demonstrated excellent temperature stability of luminescence up to 200 °C and a short decay time of several tens of nanoseconds, suggesting that this may represent a new kind of scintillation material, such as single crystals, ceramics, glass, or phosphors.
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.|‡Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
authors: Qinhua
authors: Q
authors: Wei
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.|‡Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
authors: Jieqiong
authors: J
authors: Wan
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors: Guanghui
authors: G
authors: Liu
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors: Zhenzhen
authors: Z
authors: Zhou
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.|‡Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
authors: Hua
authors: H
authors: Yang
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors: Jiacheng
authors: J
authors: Wang
authors: †State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors: Qian
authors: Q
authors: Liu
mesh_terms: D002516:Ceramics; D002563:Cerium / Q000737:chemistry*; D020650:Combinatorial Chemistry Techniques; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D015394:Molecular Structure; D017655:Silicon Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017655:Silicon Compounds; D002563:Cerium; D007811:Lanthanum
keywords: ceramic phosphors; combinatorial screening; inkjet printing; luminescence; thermo-stability