Phosphor-in-glass (PIG) converter sintered by a fast Joule heating process for high-power laser-driven white lighting

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 util...

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Bibliographic Details
Published in:Optics express 2021-05, Vol.29 (10), p.14218-14230
Main Authors: Liang, Yifu, Ding, Xinrui, Yan, Caiman, Bai, Shigen, Liang, Guanwei, Yang, Shu, Liu, Bin, Tang, Yong
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.419633