Chip-level Ce:GdYAG ceramic phosphors with excellent chromaticity parameters for high-brightness white LED device

Development of ceramic phosphors (CPs) featuring small volume and high efficacy is crucial for miniaturization of white LEDs and their integration in solid state lighting. In this study, the chip-level 2.5×2.5 mm Ce:GdYAG CPs with different thicknesses were packaged to the blue chips, and their lumi...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2021-04, Vol.29 (8), p.11938-11946
Main Authors: Xi, Xiaoqian, Zhang, Le, Kang, Jian, Li, Yanbin, Wang, Zhongying, Fei, Bin, Cheng, Xin, Huang, Guocan, Li, Ming, Chen, Hao
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Development of ceramic phosphors (CPs) featuring small volume and high efficacy is crucial for miniaturization of white LEDs and their integration in solid state lighting. In this study, the chip-level 2.5×2.5 mm Ce:GdYAG CPs with different thicknesses were packaged to the blue chips, and their luminous characteristics were analyzed under the different radiant flux. Notably, when thickness of the CPs was 1.4 mm, a luminous flux of 2000 lm, a correlated color temperature (CCT) of 6266 K and a color rendering index (CRI) of 70 were obtained under 11.0 W blue power (1.76 W/mm ) excitation. Phenomenon of colorimetric drift was explained simultaneously. These results indicate that Ce:GdYAG CPs is a promising candidate for automotive lighting and high-speed rail lighting.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.416486