Preparation and study of red phosphor pewder Gd_(2-x)Mo_3O_9:Eu_x~(3+) in white light LED

In this paper,Gd_(2-x)Mo_3O_9:Eu_x~(3+) were successfully synthesized through high-temperature solid-phase method,the crystalline phase and luminescence properties of the phosphor power were characterized by X-ray diffraction(XRD),and fluorescence spectroscopy.The results showed that the phosphors are tetragonal structure of scheelite and the phosphors exhibit strong red luminescence at 616nm when excited by light at 395 and 465nm.The red emission at 616 nm is caused by 5D0→7F2 transition of Eu3+.In this paper,we confirmed that the best sintered temperature for fluorescence emission was 950℃.When adding flux Li2CO3,the Eu3+ concentration quenching problem was solved and the Eu3+-doped concentration and fluorescence emission intensity were greatly enhanced.