Huang, H.-W.; Huang, C.-W.; Chen, Y.-C.; Cheng, W.-C.; Liu, C.-N.; Chiang, C.-C. Innovative Thin PiG Plates Boost the Luminous Efficacy and Reliability of WLEDs for Vehicles. Preprints2024, 2024070629. https://doi.org/10.20944/preprints202407.0629.v1
APA Style
Huang, H. W., Huang, C. W., Chen, Y. C., Cheng, W. C., Liu, C. N., & Chiang, C. C. (2024). Innovative Thin PiG Plates Boost the Luminous Efficacy and Reliability of WLEDs for Vehicles. Preprints. https://doi.org/10.20944/preprints202407.0629.v1
Chicago/Turabian Style
Huang, H., Chun-Nien Liu and Chia-Chin Chiang. 2024 "Innovative Thin PiG Plates Boost the Luminous Efficacy and Reliability of WLEDs for Vehicles" Preprints. https://doi.org/10.20944/preprints202407.0629.v1
Abstract
In this study, we demonstrate a high luminous efficacy of 118 lm/W and high reliability through 450°C thermal aging of white LEDs (WLEDs) utilizing four-inch YAG: Ce3+ phosphor-in-glass (PiG) plates designed for vehicle headlights. The sintering process of mixing glass and phosphor typically generates pores, which can scatter light and reduce the luminous efficacy of the fabricated PiG. In this study, we produced four-inch PiG plates under four different fabrication conditions to evaluate their luminous efficacy. Our results revealed that the PiG plate with a thin thickness of 0.08 mm exhibited a 16.83% increase in luminous efficacy compared to the 0.15 mm plate, attributed to reduced light interaction with the pores. Unlike silicone-based phosphor WLEDs, which offer high performance but lower reliability due to the silicone resin's low transition temperature (150°C), our novel thin PiG plate achieves high performance and reliability. This advancement suggests that the proposed thin PiG plate could replace traditional silicone-based phosphors, enabling the development of high-quality WLEDs for vehicle headlights in automotive applications.
Keywords
phosphor-in-glass; white LED; thin plate
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
