Preparation and Luminescence Properties of YAG:Ce~(3+) Phosphor Based on (Y_(1-x)Ce_x)_2O_3 Precursor

摘要

YAG:Ce~(3+) phosphors were synthesized by two-step method processes using (Y_(1-x)Ce_x)_2O_3 as a precursor. The luminescence, stability and structure of the phosphor powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) respectively. The XRD analysis indicates that two-step method benefits to improve phases of YAG:Ce~(3+) phosphor and obtain higher crystallinity. When Ce~(3+) doping amount was 0.67%, the two-step method was obtained maximum luminous intensity. Compared with traditional high temperature solid-state method, YAG:Ce~(3+) phosphors prepared by (Y_(1_x)Ce_x)_2O_3 precursor method have better thermal stability and moisture resistance. Furthermore, the packaging of YAG:Ce~(3+) phosphors was studied, which shows it can be well applied in high-power white light emitting diodes and laser lighting.