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Research Article | Open Access

Composition and luminescence properties of highly robust green-emitting LuAG:Ce/Al2O3 composite phosphor ceramics for high-power solid-state lighting

Ziqiu Chenga,b, Xin Liua,b, Xinrong Chenc, Jian Xuc( ), Yanbin Wanga,d, Tengfei Xiea,b, Lexiang Wua,b, Zhengfa Daia,b, Guohong Zhoua,b, Jun Zoue,f, Jiang Lia,b( )
Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Lab of New Energy Materials and Devices, School of Physics and Electronic Information, Henan Polytechnic University, Jiaozuo 454000, China
School of Material Science and Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
Shanghai Institute of Technology, Shanghai 201418, China
Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou 325024, China
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Graphical Abstract

Abstract

The major advantage of laser lighting over white light-emitting-diode is the possibility to achieve ultra-high luminance. However, phosphors usually suffer laser-induced luminescence saturation, which limits the peak luminance of laser lighting devices. The aim of the present study is to develop LuAG:Ce/Al2O3 composite ceramics (LACCs) with a high saturation threshold for high-luminance laser lighting. Owning to the rigid crystal structure, proper synthetic process, and optimized thermal design, the LACCs possess small thermal quenching (16% loss in luminescence at 225 ℃), high quantum yield (> 95%), and excellent luminescence properties. When the LACCs are irradiated by blue laser diodes in a reflection mode, a high luminous flux of 4634 lm and luminous efficacy of 283 lm·W−1 are realized. Furthermore, they show no sign of luminescence saturation even when the power density reaches 20.5 W·mm−2. With these favorable properties, the designed LACCs show great potential in high-luminance laser lighting.

Keywords

LuAG:Ce/Al2O3 composite ceramics (LACCs)luminescence saturationluminous efficacyhigh-luminance laser lighting

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Journal of Advanced Ceramics
Volume 12 Issue 3,
March 2023
Pages 625-633
DOI: 10.26599/JAC.2023.9220710
Cite this article:
Cheng Z, Liu X, Chen X, et al. Composition and luminescence properties of highly robust green-emitting LuAG:Ce/Al2O3 composite phosphor ceramics for high-power solid-state lighting. Journal of Advanced Ceramics, 2023, 12(3): 625-633. https://doi.org/10.26599/JAC.2023.9220710

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Received: 13 November 2022
Revised: 20 December 2022
Accepted: 21 December 2022
Published: 09 February 2023
© The Author(s) 2022.

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