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Journal of Advanced Ceramics 2024, 13(2): 189-197 https://doi.org/10.26599/JAC.2024.9220840
Research Article | Open Access | Issue | Published: 01 February 2024

Composite structure Al2O3/Al2O3–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

Show Author's Information Pengfei Sang1,  Le Zhang1,2,8( ),  Jian Kang2,3,  Mingzhou Li1,2,  Shiwei Chen2,4,  Peng Yang5,  Bingheng Sun6,  Yang Li7,  Wieslaw Strek9,  Hao Chen1,2( )
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou 221116, China
Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology, Xuzhou 221400, China
Xuzhou EAGLED Technology Co., Ltd., Xuzhou 221116, China
Xuzhou Kangna Advanced Materials Technology Co., Ltd., Xuzhou 221116, China
Xuzhou Fuchang Electronic Technology Co., Ltd., Xuzhou 221116, China
Shanghai Institute of Optics Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw 50-422, Poland
Keywords:
angular color uniformity, high thermal stability, high-power laser lighting, Al2O3/Al2O3–YAG:Ce/YAG
Cite this article:
Sang P, Zhang L, Kang J, et al. Composite structure Al2O3/Al2O3–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting. Journal of Advanced Ceramics, 2024, 13(2): 189-197. https://doi.org/10.26599/JAC.2024.9220840
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Abstract Full text Electronic supplementary material About this article

Composite ceramic phosphor (CCP) is a candidate light-conversion material to obtain the high-quality laser lighting source. Phosphors based on the transmissive configuration model could not simultaneously meet the requirements of angular color uniformity and high thermal stability. In this study, a novel composite structure ceramic was designed, including Al2O3–YAG:Ce/YAG layered ceramic with a size of 1 mm × 1 mm for lighting, and Al2O3 ceramic (φ = 16.0 mm) was used as the wrapping material due to its outstanding thermal stability. The prepared ceramics exhibited excellent thermal performance and no yellow ring phenomenon. Through this design, we achieved the match of the intensity distribution of the blue and yellow lights, resulting in a high angular color uniformity of 0.9 with a view angle of ±80°. All ceramics showed no luminous saturation phenomenon, even the laser power density was increased up to 47.51 W/mm2. A high-brightness white-light source with a luminous flux of 618 lm, a luminous efficiency of 126 lm/W, a CCT of 6615 K, and a CRI of 69.9 was obtained in the transmissive configuration. In particular, the surface temperature of the ceramic was as low as 74.1 ℃ under a high laser radiation (47.51 W/mm2). These results indicate that Al2O3/Al2O3–YAG:Ce/YAG composite structure ceramic is a promising luminescent material in the high-power laser lighting applications.


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Electronic supplementary material
About this article

Composite structure Al2O3/Al2O3–YAG:Ce/YAG ceramics with high color spatial uniformity for white laser lighting

Show Author's information Pengfei Sang1, Le Zhang1,2,8( ), Jian Kang2,3, Mingzhou Li1,2, Shiwei Chen2,4, Peng Yang5, Bingheng Sun6, Yang Li7, Wieslaw Strek9, Hao Chen1,2( )
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou 221116, China
Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology, Xuzhou 221400, China
Xuzhou EAGLED Technology Co., Ltd., Xuzhou 221116, China
Xuzhou Kangna Advanced Materials Technology Co., Ltd., Xuzhou 221116, China
Xuzhou Fuchang Electronic Technology Co., Ltd., Xuzhou 221116, China
Shanghai Institute of Optics Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw 50-422, Poland

Abstract

Composite ceramic phosphor (CCP) is a candidate light-conversion material to obtain the high-quality laser lighting source. Phosphors based on the transmissive configuration model could not simultaneously meet the requirements of angular color uniformity and high thermal stability. In this study, a novel composite structure ceramic was designed, including Al2O3–YAG:Ce/YAG layered ceramic with a size of 1 mm × 1 mm for lighting, and Al2O3 ceramic (φ = 16.0 mm) was used as the wrapping material due to its outstanding thermal stability. The prepared ceramics exhibited excellent thermal performance and no yellow ring phenomenon. Through this design, we achieved the match of the intensity distribution of the blue and yellow lights, resulting in a high angular color uniformity of 0.9 with a view angle of ±80°. All ceramics showed no luminous saturation phenomenon, even the laser power density was increased up to 47.51 W/mm2. A high-brightness white-light source with a luminous flux of 618 lm, a luminous efficiency of 126 lm/W, a CCT of 6615 K, and a CRI of 69.9 was obtained in the transmissive configuration. In particular, the surface temperature of the ceramic was as low as 74.1 ℃ under a high laser radiation (47.51 W/mm2). These results indicate that Al2O3/Al2O3–YAG:Ce/YAG composite structure ceramic is a promising luminescent material in the high-power laser lighting applications.

Keywords: angular color uniformity, high thermal stability, high-power laser lighting, Al2O3/Al2O3–YAG:Ce/YAG

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Received: 27 September 2023
Revised: 03 December 2023
Accepted: 06 December 2023
Published: 01 February 2024
Issue date: February 2024

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© The Author(s) 2024.

Acknowledgements

Acknowledgements

The authors acknowledge the generous financial support from the National Key R&D Program of China (2021YFB3501700, 2023YFB3506600), National Natural Science Foundation of China (52202135, 61975070, and 52302141), Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), International S&T Cooperation Program of Jiangsu Province (BZ2023007), Key Research and Development Project of Jiangsu Province (BE2023050, BE2021040), Natural Science foundation of Jiangsu Province (BK20221226), Graduate Research and Innovation Projects of Jiangsu Province (KYCX22_2845), Special Project for Technology Innovation of Xuzhou City (KC23380, KC21379, KC22461, and KC22497), and Open Project of State Key Laboratory of Crystal Materials (KF2205).

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