Three Birds with One Stone:K2SiF6:Mn4+ Single Crystal Phosphors for the High-Power and Laser-Driven Lighting
作者单位：State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology Department of Physics Fudan University
会议名称：《中国稀土学会2020学术年会暨江西(赣州)稀土资源绿色开发与高效利用大会》
会议日期：2020年
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
关 键 词：Single crystal phosphor Red emission High-power White LEDs Laser lighting
摘 要：Narrow-band red-emitting fluoride phosphors play crucial roles in lighting and backlight displays, whereas the stability issue is a major challenge. Here, highly stable K2 SiF6:Mn4+(KSFM) single crystal phosphors with tunable sizes(20 ～ 1000 μm) have been grown by a facile saturated crystallization method. The small specific surface area together with the unique Mn4+-rare interface layer in KSFM single crystals enables the simultaneous fulfillment of the high external quantum efficiency, excellent moisture, improved thermal quenching and dissipation for the high-power and laser-driven lighting applications. As a prototype, a warm white laser diode device with a high luminous flux of 202.7 lm and CCT of 3277 K, as well as a Ra of 87.9 has been presented. This work provides new insights into the development of highly efficient and stable materials for advanced lighting applications.