期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 918, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165637
关键词
White laser lighting; Reflective converter; Phosphor-in-glass (PiG); Luminous flux; Thermal stability
资金
- China Postdoctoral Science Foundation [2021M701308]
- Postdoctoral Creative Research Founding of Hubei Province
- Key Research and Development Program of Hubei Province [2021BAA213]
- Analytical and Testing Center of Huazhong University of Science and Technology
This study investigates a high reflective converter to enhance the opto-thermal performances of white laser lighting. By utilizing a high reflectivity BN glass composite and an Al substrate with high thermal conductivity, the converter achieves higher luminous flux and lower surface temperature.
Phosphor-converted white laser lighting has been considered as a promising candidate in next-generation high-brightness lighting. However, the color converter confronts the inevitable roadblock of low light extraction efficiency and poor thermal stability in reflective white laser diodes (LDs). Herein, a high reflective converter of phosphor-in-glass film-BN layer-Al substrate (PiG-BN-Al) was prepared for high-brightness white laser lighting. The effects of laser power and excitation time on opto-thermal performances of PiGBN-Al-based converter were investigated and compared with the traditional PiG-Al-based converter. Attributing to the high reflectivity of BN glass composite and the high thermal conductivity of Al substrate, the PiG-BN-Al-based converter achieves a luminous flux of 458.6 lm at a laser power of 3.15 W, which is about 70 % higher than the PiG-Al-based converter. Furthermore, the PiG-BN-Al-based converter still remains low surface temperature of 46.4 degrees C under the continuous laser excitation. The PiG-BN-Al-based converter provides an effective strategy to enhance the opto-thermal performances of white laser lighting.(c) 2022 Elsevier B.V. All rights reserved.
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