Journal
OPTICS EXPRESS
Volume 29, Issue 10, Pages 14218-14230Publisher
Optica Publishing Group
DOI: 10.1364/OE.419633
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Funding
- Guangzhou Municipal Science and Technology Project [201904010252]
- National Natural Science Foundation of China [51735004, 51805173]
- Natural Science Foundation of Guangdong Province [2019A1515011741]
- Project of the National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication (Zhongshan Branch) [190919172214566]
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This study utilized a simple, fast, and high temperature Joule heating process to fabricate phosphor-in-glass blocks, significantly improving production efficiency. The optimized PIG converter demonstrated high and robust luminous efficacy, as well as good temperature management under high power.
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. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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