Wang Pengfei, Lin Hang, Chen Guoxin, Weng Weitong, Xu Yue, Lin Yi, Xu Ju, Cheng Yao, Wang Yuansheng
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, China.
Nat Commun. 2025 Mar 21;16(1):2807. doi: 10.1038/s41467-025-58099-5.
The development of advanced high-power-density laser-driven light source requires durable and color-tunable inorganic phosphor-in-glass film composites as color converter. One challenge remains for the phosphor-in-glass film is the thermal erosion and degradation of phosphor, as harsh condition or long duration time is required to densify the film for conventional sintering. Here we develop a rapid thermal annealing technique that achieves high film densification (porosity < 3%) within seconds utilizing high-power (>10 kW) infrared irradiation. As demonstrated by high-resolution electron microscopy observation, a trivial interfacial reaction occurs, leading to almost intact phosphor particles and thus restrained luminous loss. For instance, the red-emitting SrCaAlSiN:Eu exhibits a record internal quantum efficiency of 91.2% in the processed film and achieves a luminous flux of 2379 lm and efficacy of 140 lm W after fabricating a phosphor wheel. This method reduces energy consumption, enables high-throughput screening, and offers material universality and design flexibility, paving the way for new opto-functional materials and applications.
先进的高功率密度激光驱动光源的发展需要耐用且颜色可调的无机玻璃中磷光体薄膜复合材料作为颜色转换器。玻璃中磷光体薄膜面临的一个挑战是磷光体的热侵蚀和降解，因为传统烧结需要苛刻的条件或较长的持续时间来使薄膜致密化。在此，我们开发了一种快速热退火技术，利用高功率（>10千瓦）红外辐射在几秒钟内实现高薄膜致密化（孔隙率<3%）。高分辨率电子显微镜观察表明，发生了轻微的界面反应，导致磷光体颗粒几乎保持完整，从而抑制了发光损失。例如，发红光的SrCaAlSiN:Eu在加工后的薄膜中表现出创纪录的91.2%的内量子效率，在制造磷光体轮后实现了2379流明的光通量和140流明/瓦的发光效率。这种方法降低了能耗，实现了高通量筛选，并提供了材料通用性和设计灵活性，为新型光功能材料及应用铺平了道路。
