Component Regulation and Performance Optimization of Al2O3-YAG:Ce Composite Ceramic Phosphors for High-power Laser Lighting

Solid-state laser lighting fabricated by combining blue laser diodes (LDs) and yellow-emitting phosphor converters has attracted great attention in high-luminance applications.However, the achievement of high-power laser lighting is significantly affected by the thermal quenching effect of phosphor converter materials.Therefore, component regulation and performance optimization are required to improve the thermal conductivity and luminescence uniformity of phosphor converters.In this work, a series of Al 2 O 3 -YAG:Ce composite ceramic phosphors with different Al 2 O 3 contents were prepared by solid-state reaction sintering.The influences of Al 2 O 3 contents on the microstructure, phase composition, optical properties and thermal performance of the Al 2 O 3 -YAG:Ce ceramic phosphors were investigated in detail.The total transmittance of the Al 2 O 3 -YAG:Ce ceramic phosphors at 800 nm tends to decline (82.6%→23.6%)with the increase of Al 2 O 3 content (0→90%, weight ratio).Both excitation