High Luminous Efficacy and Thermal Stability of LuAG:Ce Phosphor Ceramics with Porosity for High-brightness Laser Lighting

Haiming Li; Ziqiu Cheng; Zhenzhen Zhou; Chen Hu; Junhao Ye; Dong Huang; Yanbin Wang; Tingsong Li; Denis Yu. Kosyanov; Duyou Lu; Jiang Li

doi:10.62762/JAMR.2026.672409

Volume 2, Issue 2, Journal of Advanced Materials Research

Volume 2, Issue 2, 2026

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Journal of Advanced Materials Research, Volume 2, Issue 2, 2026: 86-96

Open Access | Research Article | 26 February 2026

High Luminous Efficacy and Thermal Stability of LuAG:Ce Phosphor Ceramics with Porosity for High-brightness Laser Lighting

Haiming Li 1,2

Ziqiu Cheng 2,3

Zhenzhen Zhou 2,3

Chen Hu 2,3

Junhao Ye 2,3

Dong Huang 2,3

Yanbin Wang 2,3

Tingsong Li 2,3

Denis Yu. Kosyanov 4,5

Duyou Lu 1 *

Jiang Li 2,3 *

1 College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China

2 State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China

3 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

4 Far Eastern Federal University, Vladivostok 690922, Russia

5 Institute of Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia

* Corresponding Authors: Duyou Lu, [email protected] ; Jiang Li, [email protected]

DOI: 10.62762/JAMR.2026.672409

ARK: ark:/57805/jamr.2026.672409

Received: 06 January 2026, Accepted: 22 February 2026, Published: 26 February 2026

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Abstract

The generation of high-brightness white light in laser-illuminated devices is achieved by exciting yellow-green phosphors with a blue laser source. This configuration offers advantages such as high energy density and strong central luminous intensity. Among luminescent materials, LuAG:Ce phosphor ceramics (PCs) are notable for their high thermal stability and luminous output. In this study, LuAG:Ce PCs were produced from co-precipitated monophase nanopowders. The effects of vacuum sintering and air annealing temperatures on their porosity and luminescent properties were investigated. The sample, sintered at 1550°C and subsequently annealed at 1350°C, exhibited 3.5 vol.% porosity, highest room-temperature emission intensity in the series, and retained 96% of that intensity upon heating to 250°C. Under 450 nm laser-diode excitation, the sample achieved a luminous efficacy of 229 lm·W$^{-1}$ while maintaining excellent thermal stability. These results indicate that introducing controlled porosity to act as light-scattering centers in LuAG:Ce ceramics is a viable materials-design strategy for enhancing the luminous performance of laser-driven lighting devices.

Graphical Abstract

Keywords

LuAG:Ce

co-precipitation

ceramics

porosity

luminescence properties

Data Availability Statement

Data will be made available on request.

Funding

This work was supported in part by the National Key R&D Program of China under Grant 2023YFB3506600; in part by the International Cooperation and Exchange Project of the National Natural Science Foundation of China under Grant W2512070; in part by the Shanghai Partnership Research Program under Grant 25HB2706600; in part by the Special Exchange Program of Chinese Academy of Sciences under Grant 121631GJHZ2024017TBJH; Denis Yu. Kosyanov gratefully acknowledges the support from the Russian Science Foundation under Grant 25-73-10179.

Conflicts of Interest

The authors declare no conflicts of interest.

AI Use Statement

The authors declare that no generative AI was used in the preparation of this manuscript.

Ethical Approval and Consent to Participate

Not applicable.

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Li, H., Cheng, Z., Zhou, Z., Hu, C., Ye, J., Huang, D., Wang, Y., Li, T., Kosyanov, D. Y., Lu, D., & Li, J. (2026). High Luminous Efficacy and Thermal Stability of LuAG:Ce Phosphor Ceramics with Porosity for High-brightness Laser Lighting. Journal of Advanced Materials Research, 2(1), 86–96. https://doi.org/10.62762/JAMR.2026.672409

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TY  - JOUR
AU  - Li, Haiming
AU  - Cheng, Ziqiu
AU  - Zhou, Zhenzhen
AU  - Hu, Chen
AU  - Ye, Junhao
AU  - Huang, Dong
AU  - Wang, Yanbin
AU  - Li, Tingsong
AU  - Yu. Kosyanov, Denis
AU  - Lu, Duyou
AU  - Li, Jiang
PY  - 2026
DA  - 2026/02/26
TI  - High Luminous Efficacy and Thermal Stability of LuAG:Ce Phosphor Ceramics with Porosity for High-brightness Laser Lighting
JO  - Journal of Advanced Materials Research
T2  - Journal of Advanced Materials Research
JF  - Journal of Advanced Materials Research
VL  - 2
IS  - 2
SP  - 86
EP  - 96
DO  - 10.62762/JAMR.2026.672409
UR  - https://www.icck.org/article/abs/JAMR.2026.672409
KW  - LuAG:Ce
KW  - co-precipitation
KW  - ceramics
KW  - porosity
KW  - luminescence properties
AB  - The generation of high-brightness white light in laser-illuminated devices is achieved by exciting yellow-green phosphors with a blue laser source. This configuration offers advantages such as high energy density and strong central luminous intensity. Among luminescent materials, LuAG:Ce phosphor ceramics (PCs) are notable for their high thermal stability and luminous output. In this study, LuAG:Ce PCs were produced from co-precipitated monophase nanopowders. The effects of vacuum sintering and air annealing temperatures on their porosity and luminescent properties were investigated. The sample, sintered at 1550°C and subsequently annealed at 1350°C, exhibited 3.5 vol.% porosity, highest room-temperature emission intensity in the series, and retained 96% of that intensity upon heating to 250°C. Under 450 nm laser-diode excitation, the sample achieved a luminous efficacy of 229 lm·W$^{-1}$ while maintaining excellent thermal stability. These results indicate that introducing controlled porosity to act as light-scattering centers in LuAG:Ce ceramics is a viable materials-design strategy for enhancing the luminous performance of laser-driven lighting devices.
SN  - 3070-5851
PB  - Institute of Central Computation and Knowledge
LA  - English
ER  -

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@article{Li2026High,
  author = {Haiming Li and Ziqiu Cheng and Zhenzhen Zhou and Chen Hu and Junhao Ye and Dong Huang and Yanbin Wang and Tingsong Li and Denis Yu. Kosyanov and Duyou Lu and Jiang Li},
  title = {High Luminous Efficacy and Thermal Stability of LuAG:Ce Phosphor Ceramics with Porosity for High-brightness Laser Lighting},
  journal = {Journal of Advanced Materials Research},
  year = {2026},
  volume = {2},
  number = {2},
  pages = {86-96},
  doi = {10.62762/JAMR.2026.672409},
  url = {https://www.icck.org/article/abs/JAMR.2026.672409},
  abstract = {The generation of high-brightness white light in laser-illuminated devices is achieved by exciting yellow-green phosphors with a blue laser source. This configuration offers advantages such as high energy density and strong central luminous intensity. Among luminescent materials, LuAG:Ce phosphor ceramics (PCs) are notable for their high thermal stability and luminous output. In this study, LuAG:Ce PCs were produced from co-precipitated monophase nanopowders. The effects of vacuum sintering and air annealing temperatures on their porosity and luminescent properties were investigated. The sample, sintered at 1550°C and subsequently annealed at 1350°C, exhibited 3.5 vol.\% porosity, highest room-temperature emission intensity in the series, and retained 96\% of that intensity upon heating to 250°C. Under 450 nm laser-diode excitation, the sample achieved a luminous efficacy of 229 lm·W\$^{-1}\$ while maintaining excellent thermal stability. These results indicate that introducing controlled porosity to act as light-scattering centers in LuAG:Ce ceramics is a viable materials-design strategy for enhancing the luminous performance of laser-driven lighting devices.},
  keywords = {LuAG:Ce, co-precipitation, ceramics, porosity, luminescence properties},
  issn = {3070-5851},
  publisher = {Institute of Central Computation and Knowledge}
}

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