High Efficiency Green‐Emitting LuAG:Ce Ceramic Phosphors for Laser Diode Lighting

Lu 3 Al 5 O 12 :Ce 3+ (LuAG:Ce 3+ ) ceramic phosphors (CPs) are regarded as the most promising green color converter and play a key role in high quality white light in the next‐generation laser diode (LD) lighting. High efficient LuAG:Ce 3+ CPs are still urgent for high luminous efficacy (LE) LD lighting devices. By designing the Ba 2+ –Si 4+ pair to keep charge balance and annealing in air to remove oxygen vacancy defects, the luminescent properties of LuAG:Ce CPs are greatly enhanced. The LE is promoted to 216.9 lm W −1 , which is the best performance of LuAG:Ce in LD lighting so far. Strategies for optimizing LuAG:Ce 3+ CPs are detailed. It is believed that this work makes a big step and the proposed strategies will inspire more researchers to approach high performance of Al‐based garnet CPs and accelerate the development of LD lighting.