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Enhancement of green emission by the codoping A+ (A=Li, Na, K) in Ca2BO3Cl：Tb3+ phosphor |
| Li Pan-Lai (李盼来)a b c, Xu Zheng (徐征)a b, Zhao Su-Ling (赵谡玲)a b, Zhang Fu-Jun (张福俊)a b, Wang Yong-Sheng (王永生)a b |
a Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China;
b Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China;
c College of Physics Science & Technology, Hebei University, Baoding 071002, China |
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Abstract Tb3+-doped Ca2BO3Cl compounds with different charge compensation approaches are synthesized by a high-temperature solid-state reaction method, and the luminescent properties and Commission Internationale de l'Eclairage (CIE) chromaticity coordinates are systematically characterized. Ca2BO3Cl:Tb3+ can produce green emission under 376 nm radiation excitation. With codoped A+ (A=Li, Na, K) as charge compensators, the relative emission intensities of Ca2BO3Cl:Tb3+ are enhanced by about 1.61, 1.97, and 1.81 times compared with those of the direct charge balance, which is considered to be due to the effect of the difference in ion radius on the crystal field. The CIE chromaticity coordinates of Ca2BO3Cl:Tb3+, A+ (A=Li, Na, K) are (0.335, 0.584), (0.335, 0.585), and (0.335, 0.585), corresponding to the hues of green. Therefore, A+ (A=Li, Na, K) may be the optimal charge compensator for Ca2BO3Cl:Tb3+.
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Received: 21 December 2012
Revised: 06 January 2013
Accepted manuscript online:
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PACS:
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78.55.-m
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(Photoluminescence, properties and materials)
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33.50.Dq
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(Fluorescence and phosphorescence spectra)
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33.20.Kf
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(Visible spectra)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2010CB327704), the National Natural Science Foundation of China (Grant No. 51272022), the New Century Excellent Talents in University, China (Grant No. NCET-10-0220), the Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20120009130005), the Excellent Doctor's Science and Technology Innovation Foundation of Beijing Jiaotong University, China (Grant No. 2011YJS073), and the Fundamental Research Funds for the Central Universities (Grant No. 2012JBZ001). |
Corresponding Authors:
Xu Zheng
E-mail: zhengxu@bjtu.edu.cn
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Cite this article:
Li Pan-Lai (李盼来), Xu Zheng (徐征), Zhao Su-Ling (赵谡玲), Zhang Fu-Jun (张福俊), Wang Yong-Sheng (王永生) Enhancement of green emission by the codoping A+ (A=Li, Na, K) in Ca2BO3Cl：Tb3+ phosphor 2013 Chin. Phys. B 22 087803
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