Core-spacer-shell structured NaGdF4:Yb3+/Er3+@NaGdF4@Ag nanoparticles for plasmon-enhanced upconversion luminescence

	Core-spacer-shell structured NaGdF4:Yb3+/Er3+@NaGdF4@Ag nanoparticles for plasmon-enhanced upconversion luminescence
	Zhang, X. D.; B. Li; M. M. Jiang; L. M. Zhang and H. P. Ma
	2016
发表期刊	Rsc Advances
卷号	6 期号:43
摘要	The Eu2+-induced enhancement of defect luminescence of ZnS was studied in this work. While photoluminescence (PL) spectra exhibited 460 nm and 520 nm emissions in both ZnS and ZnS:Eu nanophosphors, different excitation characteristics were shown in their photoluminescence excitation (PLE) spectra. In ZnS nanophosphors, there was no excitation signal in the PLE spectra at the excitation wavelength lambda(ex) > 337 nm (the bandgap energy 3.68 eV of ZnS); while in ZnS:Eu nanophosphors, two excitation bands appeared that were centered at 365 nm and 410 nm. Compared with ZnS nanophosphors, the 520 nm emission in the PL spectra was relatively enhanced in ZnS:Eu nanophosphors and, furthermore, in ZnS:Eu nanophosphors the 460 nm and 520 nm emissions increased more than 10 times in intensity. The reasons for these differences were analyzed. It is believed that the absorption of Eu2+ intra-ion transition and subsequent energy transfer to sulfur vacancy, led to the relative enhancement of the 520 nm emission in ZnS:Eu nanophosphors. In addition, more importantly, Eu2+ acceptor-bound excitons are formed in ZnS: Eu nanophosphors and their excited levels serve as the intermediate state of electronic relaxation, which decreases non-radiative electronic relaxation and thus increases the intensity of the 460 nm and 520 nm emission dramatically. In summary, the results in this work indicate a new mechanism for the enhancement of defect luminescence of ZnS in Eu2+-doped ZnS nanophosphors. Copyright (C) 2016 John Wiley & Sons, Ltd.
文章类型	期刊
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/57437
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang, X. D.,B. Li,M. M. Jiang,et al. Core-spacer-shell structured NaGdF4:Yb3+/Er3+@NaGdF4@Ag nanoparticles for plasmon-enhanced upconversion luminescence[J]. Rsc Advances,2016,6(43).
APA	Zhang, X. D.,B. Li,M. M. Jiang,&L. M. Zhang and H. P. Ma.(2016).Core-spacer-shell structured NaGdF4:Yb3+/Er3+@NaGdF4@Ag nanoparticles for plasmon-enhanced upconversion luminescence.Rsc Advances,6(43).
MLA	Zhang, X. D.,et al."Core-spacer-shell structured NaGdF4:Yb3+/Er3+@NaGdF4@Ag nanoparticles for plasmon-enhanced upconversion luminescence".Rsc Advances 6.43(2016).

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Core-spacer-shell st（1221KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载