Open AccessPhosphor-in-glass (PIG) converter sintered by a fast Joule heating process for high-power laser-driven white lighting
Author(s) -
Yifu Liang,
Xinrui Ding,
Caiman Yan,
Shigen Bai,
Guanwei Liang,
Shu Yang,
Bin Liu,
Yong Tang
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.419633
Subject(s) - materials science , joule heating , phosphor , fabrication , luminous flux , laser , optoelectronics , optics , led lamp , luminous efficacy , joule (programming language) , sintering , electric heating , nuclear engineering , composite material , power (physics) , layer (electronics) , medicine , light source , alternative medicine , physics , pathology , quantum mechanics , engineering
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.