Zhang Dao, Xiao Wenge, Liu Chang, Liu Xiaofeng, Ren Jinjun, Xu Beibei, Qiu Jianrong
State Key Laboratory of Modern Optical Instrumentation, School of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
Nat Commun. 2020 Jun 4;11(1):2805. doi: 10.1038/s41467-020-16649-z.
The development of high-power white light-emitting diodes demands highly efficient and stable all-inorganic color converters. In this respect, phosphor-glass/ceramic composites show great promise as they could combine the merits of high quantum efficiency of phosphors and high chemical and thermal stabilities of glass/ceramic matrices. However, strong interfacial reaction between phosphors and matrices at high temperature results in quantum efficiency loss of the embedded phosphors, and traditional solutions rely on high-pressure consolidation techniques. Here we report the intrinsic inhibition of interfacial reaction by using silica glass rather than multicomponent glasses as the matrix. The embedment of phosphors is achieved via a pressureless sintering method, rendering these color-tunable phosphor-glass composites not only accessible to three-dimensional printing technique, but also highly efficient (internal quantum efficiency >90.0%), thermally stable at 1200 °C and hydrothermally stable at 200 °C. Our results provide a facile and general strategy for developing all-inorganic functional composites.
高功率白光发光二极管的发展需要高效且稳定的全无机颜色转换材料。在这方面，荧光粉 - 玻璃/陶瓷复合材料展现出巨大潜力，因为它们可以兼具荧光粉的高量子效率以及玻璃/陶瓷基体的高化学稳定性和热稳定性。然而，高温下荧光粉与基体之间强烈的界面反应会导致嵌入荧光粉的量子效率损失，并且传统解决方案依赖于高压固结技术。在此，我们报道通过使用石英玻璃而非多组分玻璃作为基体来实现对界面反应的固有抑制。荧光粉的嵌入通过无压烧结方法实现，这使得这些颜色可调的荧光粉 - 玻璃复合材料不仅适用于三维打印技术，而且效率极高（内量子效率>90.0%），在1200℃下热稳定，在200℃下水热稳定。我们的结果为开发全无机功能复合材料提供了一种简便通用的策略。
