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Color-tunable visible photoluminescence of Eu:CaF2 single crystals: variations of valence state and local lattice environment of Eu ions
Yu, Hao; Zhang, Bo; Chen, Xueyuan; Qian, Xiaobo; Jiang, Dapeng; Wu, Qinghui; Wang, Jingya; Xu, Jun; Su, Liangbi
2019-01-21
Source PublicationOPTICS EXPRESS
ISSN1094-4087
Volume27Issue:2Pages:523
SubtypeArticle
AbstractIn this article, Eu-activated CaF2 single crystals were synthesized by Bridgman-Stockbarge method. The dependence of photoluminescence properties of Eu: CaF2 crystals in UV-Vis regions on EuF3 doping concentrations were investigated. While the EuF3 doping concentration is increased from 0.6% to 6.0%, the CIE (Commission Internationale de L'Eclairage) color coordinates of Eu: CaF2 crystals can be tuned from (0.28, 0.12) to (0.60, 0.38), corresponding to the luminescence color from blue to orange. XPS (X-ray Photoelectron Spectroscopy) measurements indicated that Eu2+ and Eu3+ ions both existed in the crystals. With EuF3 doping concentration increasing, the proportion of Eu3+ ions increase from 16.73% to 39.00%, while that of Eu2+ ions decrease from 83.27% to 61.00%. Moreover, the integrated intensity ratio (R) of the 614 mn to 593 mn of Eu3+ ions increase from 0.38 to 0.44, indicating the local lattice environment symmetry of Eu3+ ions become lower with higher EuF3 doping concentrations. Furthermore, the CIE chromaticity coordinates of Eu: CaF2 crystals greatly depend on the excitation wavelength. The warm white-light emission has been realized in 0.6%Eu: CaF2 crystal when the excitation wavelength is around 322 mu. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI10.1364/OE.27.000523
Language英语
WOS Research AreaOptics
PublisherOPTICAL SOC AMER
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27389
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Yu, Hao,Zhang, Bo,Chen, Xueyuan,et al. Color-tunable visible photoluminescence of Eu:CaF2 single crystals: variations of valence state and local lattice environment of Eu ions[J]. OPTICS EXPRESS,2019,27(2):523.
APA Yu, Hao.,Zhang, Bo.,Chen, Xueyuan.,Qian, Xiaobo.,Jiang, Dapeng.,...&Su, Liangbi.(2019).Color-tunable visible photoluminescence of Eu:CaF2 single crystals: variations of valence state and local lattice environment of Eu ions.OPTICS EXPRESS,27(2),523.
MLA Yu, Hao,et al."Color-tunable visible photoluminescence of Eu:CaF2 single crystals: variations of valence state and local lattice environment of Eu ions".OPTICS EXPRESS 27.2(2019):523.
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