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New insights into the microstructure of translucent CaAlSiN3:Eu2+phosphor ceramics for solid-state laser lighting
Li, Shuxing1,2,3; Tang, Daiming4; Tian, Zifeng5; Liu, Xuejian1; Takeda, Takashi2; Hirosaki, Naoto2; Xu, Fangfang6; Huang, Zhengren1; Xie, Rong-Jun2,7
2017
Source PublicationJournal of Materials Chemistry C
ISSN20507534
Volume5Issue:5Pages:1042-1051
AbstractNewly emerged phosphor ceramics play key roles in high-brightness solid-state laser lighting technologies. Recently, we developed a translucent CaAlSiN3:Eu2+red-emitting ceramic, with high quantum efficiency (up to 60%) and thermal robustness (15% higher than the powders). In the current work, detailed structural analyses are carried out by advanced analytical techniques, such as TEM and EPMA, in tandem with the CL, to reveal the correlation between the optical properties and the microstructure, especially the contribution of the interface. It was found that the ceramics consist of many core-shell structured phosphor particles. The shell is coated by a highly crystallized Ca-α-Sialon thin layer to reduce the surface defects. Such core-shell particles are embedded in a non-luminescent matrix of nano-sized Ca-α-Sialon particles tightly surrounded by an amorphous phase, both of which have little influence on the light propagation. Thanks to the unique core-shell structure of phosphor particles and the tight interfaces in the matrix, the bulk CaAlSiN3:Eu2+ceramic shows record high performance under blue laser irradiation. The output luminous flux increases linearly as the incident power density increases from 20 to 150 W cm−2with a constant high luminous efficacy of 42.2 lm W−1, demonstrating its promising application in solid-state laser lighting. © The Royal Society of Chemistry.
DOI10.1039/c6tc04987g
EI Accession Number20170603326767
EI KeywordsSolid state lasers
EI Classification Number408.2 Structural Members and Shapes - 741.1 Light/Optics - 744.4 Solid State Lasers - 812.1 Ceramics - 951 Materials Science
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25507
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Lab. of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Sialon Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba; 305-0044, Japan;
3.University of Chinese Academy of Sciences, Beijing; 100049, China;
4.Thermal Energy Materials Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba; 305-0044, Japan;
5.Appotronics Corporation, Shenzhen; 518055, China;
6.Analysis and Testing Center for Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
7.College of Materials, Xiamen University, Xiamen; 361005, China
Recommended Citation
GB/T 7714
Li, Shuxing,Tang, Daiming,Tian, Zifeng,et al. New insights into the microstructure of translucent CaAlSiN3:Eu2+phosphor ceramics for solid-state laser lighting[J]. Journal of Materials Chemistry C,2017,5(5):1042-1051.
APA Li, Shuxing.,Tang, Daiming.,Tian, Zifeng.,Liu, Xuejian.,Takeda, Takashi.,...&Xie, Rong-Jun.(2017).New insights into the microstructure of translucent CaAlSiN3:Eu2+phosphor ceramics for solid-state laser lighting.Journal of Materials Chemistry C,5(5),1042-1051.
MLA Li, Shuxing,et al."New insights into the microstructure of translucent CaAlSiN3:Eu2+phosphor ceramics for solid-state laser lighting".Journal of Materials Chemistry C 5.5(2017):1042-1051.
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