1. Ce:GdYAG phosphor-in-glass: An innovative yellow-emitting color converter for solid-state laser lighting.
- Author
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Wang, Luhan, Zhang, Jiangdan, Xu, Li, Bao, Shuyang, Wang, Yu, Liu, Jiawei, Liang, Xiaojuan, and Xiang, Weidong
- Subjects
SEMICONDUCTOR lasers ,BLUE lasers ,SOLID-state lasers ,QUANTUM efficiency ,PHOSPHORS ,COLOR temperature ,THERMAL conductivity ,QUANTUM wells - Abstract
• High quality yellow-emitting Ce:GdYAG PiG can be successfully synthesized by a facile solid-state sintering method. • Ce:GdYAG PiG presents an excellent IQE of 91% and a high thermal conductivity of 1.844 W m
−1 K−1 . • Ce:GdYAG PiG displays a LE of 163.5 lm/W, high CRI of 74.8 and low CCT of 4806.8 K under blue laser excitation. • The color of the modular LDs (constructed by Ce:GdYAG PiG) converts from blue to yellow which realizes chromaticity adjustment easily. Stable, efficient and high color rendering index all-inorganic color converters are urgently demanded for white laser diodes. Phosphor-in-glass (PiG), possessing the advantages of phosphors excellent quantum efficiency as well as favorable chemical and thermal stability of glass, has attracted widespread attention. There have been only very few reports of Y 1.31 Ce 0.09 Gd 1.6 Al 5 O 12 (Ce:GdYAG) PiG for solid-state laser lighting. Herein, a series of Ce:GdYAG PiG samples are fabricated by a simple solid-state sintering method. Impressively, the supreme internal quantum efficiency of as-prepared PiG is 91%, which is very close to original phosphors (95%). Furthermore, PiG exhibits a high thermal conductivity (1.844 W m−1 K−1 ) and a maximum transparency (62%). Remarkably, by changing the concentration of phosphors and the thickness of PiG samples, a luminous efficacy of 163.5 lm/W, high color rendering index of 74.8 and low correlated color temperature of 4806.8 K are achieved under blue laser irradiation. These results indicate that the Ce:GdYAG PiG samples have shown tremendous application foreground as all-inorganic color converter for solid-state laser lighting. [ABSTRACT FROM AUTHOR]- Published
- 2023
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