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Research Article | Open Access

Cyan-green-emitting Ca3Sc2Si3O12:Ce3+ transparent ceramics: A promising color converter for high-brightness laser lighting

Huajun Wua, Hao Wua, Guo-Hui Pana, Liangliang Zhanga, Zhendong Haoa( ), Jiahua Zhanga,b( )
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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Graphical Abstract

Abstract

Transparent phosphor ceramics have received increasing attention for high-brightness laser lighting, but commercially available phosphor ceramics are currently mainly limited to yellow YAG:Ce and green LuAG:Ce garnets, leaving a "cyan cavity" which is an obstacle to realizing full-color lighting. Achieving new phosphor ceramics capable of filling the cavity is a challenge. Herein, for the first time, cyan-green-emitting Ca3Sc2Si3O12:Ce3+ (CSS:Ce) transparent ceramics have been successfully developed by two-step sintering technique under vacuum. The as-prepared CSS:Ce ceramics present high relative density of 99.7% and optical transmittance of 71% in the cyan-green spectral region. It exhibits an efficient band emission peaking at 504 nm (under 450 nm excitation) with internal/external quantum efficiency of 91%/62%. Furthermore, it has excellent thermal stability with a thermal quenching temperature (T0.5) of 838 K, approximately 100 K higher than that of LuAG:Ce ceramics (738 K). In addition, the CSS:Ce ceramics can withstand blue laser density of 45.6 W/mm2 and meanwhile generates cyan-green light with a forward luminous flux of 813 lm and forward luminous efficacy of 162 lm/W. The CSS:Ce transparent ceramics exhibit excellent luminescence performance comparable to the commercial LuAG:Ce ceramics and could be a highly promising color converter for high-brightness laser lighting.

Keywords

transparent ceramicscolor converterlaser lightinggarnetCa3Sc2Si3O12 (CSS)

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Journal of Advanced Ceramics
Volume 12 Issue 9,
September 2023
Pages 1731-1741
DOI: 10.26599/JAC.2023.9220782
Cite this article:
Wu H, Wu H, Pan G-H, et al. Cyan-green-emitting Ca3Sc2Si3O12:Ce3+ transparent ceramics: A promising color converter for high-brightness laser lighting. Journal of Advanced Ceramics, 2023, 12(9): 1731-1741. https://doi.org/10.26599/JAC.2023.9220782

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Received: 05 May 2023
Revised: 08 June 2023
Accepted: 24 June 2023
Published: 01 September 2023
© The Author(s) 2023.

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