材料科学
荧光粉
激光器
色温
光电子学
显色指数
功率密度
光学
量子效率
蓝宝石
发光效率
辐照
照度
固态照明
发光二极管
纳米技术
功率(物理)
物理
量子力学
图层(电子)
核物理学
作者
Cong Zhao,Shuyang Bao,Qianxiong Wen,Li Xu,Luhan Wang,Xidong Wang,Xiangjia Sun,Xiaojuan Liang,Le Zhang,Weidong Xiang
标识
DOI:10.1016/j.ceramint.2023.02.240
摘要
To withstand higher power density (PD), exhibit higher luminous efficiency (LE), use in smaller size and lower cost has become the direction of solid-state lighting technology. In the face of high-density laser irradiation and strong thermal shock, improving the performance of color conversion materials related to laser illumination has become a research hotspot. In this study, The Y3Al5O12:Ce3+ phosphor-in-glass film (Ce:YAG-PiF) was obtained by scraping method. The optimized Ce: YAG-PiF external quantum efficiency (EQE) reaches 74.7%, closing to the phosphor (EQE = 78.47%). Excitingly, at 573 K, the thermal conductivity of sample remains at 9.47 W m−1 K−1. Besides, the sample has an ultra-high LE of 256 lm/W @ 32.47 W/mm2. After recombining with the red phosphor CaAlSiN3:Eu2+ (CASN), the color rendering index (CRI) is 84.6, the correlation color temperature (CCT) is 5594 K, and the LE is 192.91 lm/W @ 39.87 W/mm2. More importantly, the relative intensity of laser module packaged by Ce:YAG & CASN-PiF decreased by 15% when tested at 4 W for 24 h. Besides, the packaged laser flashlight has good collimation within a visible illuminance. All the results show that the prepared sample can maintain high emission intensity at high laser PD and have a good heat resistance, which is a promising color conversion material in the field of solid-state laser illumination.
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