Photoluminescence properties of Ca4La6(SiO4)4(PO4)2O2-based phosphors for wLEDs

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 62-67
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL201917.051602

摘要

The apatite compound Ca4La6(SiO4)4(PO4)2O2 (CLSPO) was explored as the host material for phosphors used in white light-emitting diodes (wLEDs).The crystal structure of the CLSPO host prepared by the solid-state reaction method was investigated with Rietveld refinement.The rare earth ions (Eu3+/Tb3+/Ce3+,Tb3+/Tb3+,Mn2+)activated CLSPO phosphors were synthesized,and their photoluminescence properties,quantum yields,as well as thermal stabilities,were studied.Under near-ultraviolet excitations,the Eu3+ and Tb3+-doped CLSPO compounds exhibited red and green emissions with high luminescence efficiencies.Besides,tunable emissions from green to orange were obtained by introducing Mn2+ ions into the Tb3+-doped CLSPO samples.The results showed that the phosphors studied may have potential applications for wLEDs.