Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Decrease in particle size and enhancement of upconversion emission through Y3+ ions doping in hexagonal NaLuF4:Yb3+/Er3+ nanocrystals | |
Xiang, G. T.; J. H. Zhang; Z. D. Hao; X. Zhang; G. H. Pan; Y. S. Luo and H. F. Zhao | |
2015 | |
发表期刊 | Crystengcomm |
卷号 | 17期号:16页码:3103-3109 |
摘要 | The upconversion (UC) enhancement with size decrease has been realized through Y3+ ions doping in beta-NaLuF4:Yb3+/Er3+ nanocrystals (NCs) by a solvothermal process. X-Ray diffraction (XRD), scanning electron microscopy (SEM) and UC luminescence spectra were used to characterize the resulting samples. With an increase of the Y3+ doping concentration, the NCs size is continuously decreased with no phase transition. Meanwhile, the UC intensity is firstly increased and then it decreases when the Y3+ ions concentration is over 30 mol%. The NCs (beta-NaLu0.48Y0.3Yb0.2Er0.02F4) with the optimum Y3+ ions doping concentration (30 mol%) for UC emission have a diameter of about 80 nm. Compared with beta-NaLu0.78Yb0.2Er0.02F4 and beta-NaY0.78Yb0.2Er0.02F4 prepared under the same conditions, the green UC emission is enhanced by a factor of 1.8 and 16, respectively, for beta-NaLu0.48Y0.3Yb0.2Er0.0 F-2(4). The variation of the UC intensity with the increasing Y3+ ions concentration is attributed to the changing of the symmetry of the local crystal field induced by Y3+ ions doping, which has been proved by the structural probe Eu3+ ions. For beta-NaLu0.78Yb0.2Er0.02F4 and beta-NaLu0.48Y0.3Yb0.2Er0.02F4, a three-photon green UC process and a three-photon red UC process occur simultaneously at high pump power density, which can be described as (4)G(11)/(2) (Er3+) + I-4(15)/(2) (Er3+) -> H-2(11)/(2)/S-4(3)/(2) (Er3+) + I-4(13)/(2) (Er3+) and (4)G(11)/(2) (Er3+) + F-2(7)/(2) (Yb3+). F-4(9)/(2) (Er3+) + F-2(5)/(2) (Yb3+), respectively. |
收录类别 | SCI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/55480 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Xiang, G. T.,J. H. Zhang,Z. D. Hao,et al. Decrease in particle size and enhancement of upconversion emission through Y3+ ions doping in hexagonal NaLuF4:Yb3+/Er3+ nanocrystals[J]. Crystengcomm,2015,17(16):3103-3109. |
APA | Xiang, G. T.,J. H. Zhang,Z. D. Hao,X. Zhang,G. H. Pan,&Y. S. Luo and H. F. Zhao.(2015).Decrease in particle size and enhancement of upconversion emission through Y3+ ions doping in hexagonal NaLuF4:Yb3+/Er3+ nanocrystals.Crystengcomm,17(16),3103-3109. |
MLA | Xiang, G. T.,et al."Decrease in particle size and enhancement of upconversion emission through Y3+ ions doping in hexagonal NaLuF4:Yb3+/Er3+ nanocrystals".Crystengcomm 17.16(2015):3103-3109. |
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