| 초록 |
Solid state laser lighting, which is combines a laser diode (LD) with a YAG:Ce3+ phosphor have been attracted as next-generation light source due to their remarkable characteristics such as environmental-friendly device, long operating time, low energy-consumption and high brightness, compared to conventional light source. Phosphors can be made into various types of packages. For laser-based automotive headlamps, phosphor converter, which can be operated without degradation characteristic at high power light energy, is required. Among the various converter types, polycrystalline phosphor plates have better thermal properties than packages using polymers or binders. Various factors are important in the optical properties of polycrystalline phosphor plates, including density, grain size, and porosity, etc. These factors can be controlled by using pore forming agent, sintering aid, precursor and so on. In this study, the YAG:Ce3+ ceramic phosphor plates (CPP) were prepared under various conditions, such as amounts of sintering aid, sintering temperature, sintering atmosphere and manufacturing process. We observed the particle size, pore size, and density of the fabricated plates, and also compared the optical characteristics difference through laser diode packaging. |
