Sang Pengfei, Zhang Le, Kang Jian, Li Yanbin, Chen Shiwei, Yang Peng, Sun Bingheng, Li Yang, Chen Hao
Opt Express. 2022 Oct 24;30(22):40951-40964. doi: 10.1364/OE.475226.
High-power, high-brightness laser lighting promotes new requirements for light-conversion materials, such as high thermal conductivity, high saturation threshold and compact encapsulation. In this paper, we designed and fabricated a novel composite structure ceramic including a 1.0 × 1.0 mm AlO-YAG:Ce ceramic and a φ=16.0 mm transparent YAG ceramic for the transmissive configuration in laser lighting. When pumped by blue laser from 0∼60 W mm, all the samples exhibited no luminous saturation phenomenon, and the 10.0 wt.%AlO-YAG:Ce/YAG composite ceramic with the thickness of 0.3 mm maintained white light with a luminous efficacy over 200 lm/W. Moreover, a maximal luminous flux over 1000 lm, a correlated color temperature (CCT) of 5471 K, and an operating temperature as low as 92.3 °C were obtained under the excitation power density as high as 60 W/mm. The configuration that AlO-YAG:Ce encapsulated by YAG reflects an excellent optical and thermal properties by using transparent and highly thermally conductive YAG materials. These results indicate that AlO-YAG:Ce/ YAG composite ceramic phosphor is a promising candidate in transmissive configuration for automotive lighting and laser searchlight.
高功率、高亮度激光照明对光转换材料提出了新的要求，如高导热性、高饱和阈值和紧凑封装。本文设计并制备了一种新型复合结构陶瓷，其包括用于激光照明透射配置的1.0×1.0毫米AlO-YAG:Ce陶瓷和φ=16.0毫米的透明YAG陶瓷。当由0至60瓦/毫米的蓝光激光泵浦时，所有样品均未表现出光饱和现象，厚度为0.3毫米的10.0重量%AlO-YAG:Ce/YAG复合陶瓷保持了超过200流明/瓦的发光效率的白光。此外，在高达60瓦/毫米的激发功率密度下，获得了超过1000流明的最大光通量、5471 K的相关色温以及低至92.3°C的工作温度。YAG封装AlO-YAG:Ce的结构通过使用透明且高导热的YAG材料展现出优异的光学和热性能。这些结果表明，AlO-YAG:Ce/YAG复合陶瓷荧光粉在汽车照明和激光探照灯的透射配置中是一种有前景的候选材料。
