Liang Yifu, Ding Xinrui, Yan Caiman, Bai Shigen, Liang Guanwei, Yang Shu, Liu Bin, Tang Yong
Opt Express. 2021 May 10;29(10):14218-14230. doi: 10.1364/OE.419633.
Currently, laser-driven lighting based on phosphor-in-glass (PIG) has drawn much interest in solid state lighting due to its high electro-optical efficiency and high-power density. However, the fabrication of PIG requires expensive equipment, long sintering time, and high cost. In this work, we utilized a simple, fast, and high temperature Joule heating process to make phosphor-in-glass bulk sintered in less than 20 s, which greatly improved the production efficiency. The PIG converters sintered under different sintering temperatures were investigated experimentally. The optimized PIG converter exhibited high and robust luminous efficacy (164.24 lm/W), a high radiant flux, and a small CCT deviation at 3.00 W. Moreover, the optimized sample also showed high temperature resistance at 3.00 W, robust temperature management during normal working. These results indicated that the optimized PIG converter sintered by the Joule heating process could offer great potential for the application in high-power laser-driven white lighting.
目前，基于玻璃中荧光粉（PIG）的激光驱动照明因其高电光效率和高功率密度而在固态照明领域引起了广泛关注。然而，PIG的制造需要昂贵的设备、较长的烧结时间和较高的成本。在这项工作中，我们采用了一种简单、快速且高温的焦耳加热工艺，使玻璃中荧光粉体在不到20秒的时间内烧结完成，这大大提高了生产效率。对在不同烧结温度下烧结的PIG转换器进行了实验研究。优化后的PIG转换器在3.00 W时表现出高且稳定的发光效率（164.24 lm/W）、高辐射通量和小的色坐标温度偏差。此外，优化后的样品在3.00 W时还表现出高耐热性，在正常工作期间具有稳定的温度管理。这些结果表明，通过焦耳加热工艺烧结的优化PIG转换器在高功率激光驱动白光照明应用中具有巨大潜力。
