At present, solid-state laser-driven lighting fabricated with blue laser diode (LD) and phosphor has been greatly developed in high-power lighting applications. The major obstacle is the luminescence saturation threshold of the fluorescence conversion material (YAG:Ce). In this work, we successfully prepared a series of high-quality and robust YAG:Ce single crystals. With high quantum efficiency (QE = 92%), regular crystal structure and high thermal conductivity, the single-crystal has excellent ability to deal with high radiation flux and thermal accumulation generated by high power. Matching the single-crystal with the laser, the luminous efficiency up to 274 lm/W and saturation threshold of 12 W/mm² were obtained. In addition, the influence of Ce doping concentration and sample processing conditions on the indicators in laser-driven white lighting was systematically studied. The results are of great significance and are believed to promote the development of solid-state laser-driven lighting.

目前，用蓝色激光二极管（LD）和荧光粉制造的固态激光驱动照明在大功率照明应用中得到了很大的发展。主要障碍是荧光转换材料（YAG：Ce）的发光饱和阈值。在这项工作中，我们成功地制备了一系列高质量且坚固的 YAG:Ce 单晶。该单晶具有高量子效率（QE = 92%）、规则的晶体结构和高热导率，具有出色的处理高功率产生的高辐射通量和热积累的能力。单晶与激光匹配，发光效率高达274 lm/W，饱和阈值12 W/mm ²获得。此外，系统研究了Ce掺杂浓度和样品处理条件对激光驱动白光中各项指标的影响。该成果意义重大，相信会推动固态激光驱动照明的发展。