Author/Authors :
Guang CHENG، نويسنده , , Quansheng Liu، نويسنده , , Liqun CHENG، نويسنده , , Liping Lu، نويسنده , , Haiying Sun، نويسنده , , YiQing Wu، نويسنده , , Zhaohui BAI، نويسنده , , Xiyan Zhang، نويسنده , , Guanming QIU، نويسنده ,
Abstract :
Sr3SiO5:Eu2+ yellow phosphors for white LEDs were synthesized by high temperature solid state reaction method under a reductive atmosphere. The crystalline phases were examined with X-ray diffraction (XRD). Luminescence properties were studied, and effects of various fluxing agents BaCl2, MgF2, CaF2 and BaF2 on the emission spectra were also studied. The optimal Eu2+ concentration and flux were determined. Sr3SiO5: Eu2+ was obtained by firing the sample on optimal composition and fabrication process. The sample showed a broad excitation band from 300 to 500 nm and a broad band emission peaking at 561 nm.
Keywords :
rare earths , fluxing agents , Sr3SiO5:Eu2+ , Phosphor
