Ca-α-SiAlON:Eu Phosphors: Oxidation States, Energy Transfer, and Emission Enhancement by Incorporation-Aimed Surface Engineering
文献类型：期刊论文
| 作者 | Chen, Xiangyang1,2; Gan, Lin3; Zhang, Zhijun4; Lu, Ping1; Zeng, Xionghui5; Zhang, Linlin1; Yao, Heliang1; Xu, Fangfang1; Zhao, Jingtai4 |
| 刊名 | ACS Applied Materials and Interfaces
 |
| 出版日期 | 2017 |
| 卷号 | 9期号:36页码:30982-30991 |
| ISSN号 | 19448244 |
| DOI | 10.1021/acsami.7b05603 |
| 英文摘要 | Ca-α-SiAlON:Eu is one of the most promising phosphors exhibiting potential applications in high power LEDs owing to its excellent thermal stability and relatively high luminescence efficiency comparable to YAG:Ce commercial phosphors. The oxidation states of Eu ions in Ca-α-SiAlON:Eu are still questionable, and furthermore it exhibits lower luminescence intensity than commercial yellow phosphors. Therefore, in the present work, the valences of Eu ions in Ca-α-SiAlON have been examined, from which a mixture of divalence and trivalence is observed. Further improvement in emission intensity involves finding a way to increase the incorporation of larger Eu ions into the Ca-α-SiAlON. Here, we observed preferred doping of Eu around phosphor grain surface and then propose a surface engineering strategy involving HF pickling of glassy surface layer, formation of Eu-rich precursors, and finally post-annealing, aiming to increase surface incorporation of Eu ions. The surface engineered samples exhibit great enhancement in emission intensity with a maximum increment by 80%. © 2017 American Chemical Society. |
| 源URL | [http://ir.sic.ac.cn/handle/331005/25775]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China; 2.University of Chinese Academy of Science, Beijing; 100039, China; 3.Min. of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan; 430062, China; 4.School of Materials Science and Engineering, Shanghai University, Shanghai; 200444, China; 5.Electron Microscope Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou; 215123, China |
| 推荐引用方式 GB/T 7714 | Chen, Xiangyang,Gan, Lin,Zhang, Zhijun,et al. Ca-α-SiAlON:Eu Phosphors: Oxidation States, Energy Transfer, and Emission Enhancement by Incorporation-Aimed Surface Engineering[J]. ACS Applied Materials and Interfaces,2017,9(36):30982-30991. |
| APA | Chen, Xiangyang.,Gan, Lin.,Zhang, Zhijun.,Lu, Ping.,Zeng, Xionghui.,...&Zhao, Jingtai.(2017).Ca-α-SiAlON:Eu Phosphors: Oxidation States, Energy Transfer, and Emission Enhancement by Incorporation-Aimed Surface Engineering.ACS Applied Materials and Interfaces,9(36),30982-30991. |
| MLA | Chen, Xiangyang,et al."Ca-α-SiAlON:Eu Phosphors: Oxidation States, Energy Transfer, and Emission Enhancement by Incorporation-Aimed Surface Engineering".ACS Applied Materials and Interfaces 9.36(2017):30982-30991. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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