外文题目: Preparation, upconversion luminescence, and solid-state NMR studies of water-soluble hexagonal NaScF4:Yb/Er microcrystals
作者: Yang, Mingshun; Ren, Jinjun; Zhang, Ruili
刊名: J. Alloy. Compd.
年: 2017 卷: 714 页： 160--167
英文关键词:
NaScF4; Upconversion luminescence; Solid-state NMR
SCANDIUM FLUORIDE NANOCRYSTALS; LANTHANIDE-DOPED NANOCRYSTALS; UPCONVERTING NANOPARTICLES; CRYSTAL-STRUCTURE; RED EMISSION; SIZE CONTROL; IN-VITRO; EFFICIENCY; SURFACE; PHASE
英文摘要:
Water-soluble hexagonal NaScF4:Yb/Er upconversion microcrystals (UCMCs) were synthesized using the hydrothermal method. The upconversion photoluminescence properties of NaScF4:xYb/2%Er microcrystals (x=4-20%) were characterized under a 980-nm-wavelength laser excitation. The dependence of red/green (R/G) ratio on the concentration of Yb3+ ions was investigated. The local environments of dopant ions (Yb3+, Er3+) in NaScF4 were studied using multiple solid-state nuclear magnetic resonance (NMR) techniques. The F-19 single pulse and F-19{Na-23} and F-19{Sc-45} rotational echo double resonance (REDOR) techniques proved that the dopant rare-earth ions (Yb3+, Er3+) preferred to substitute Na+ rather than Sc3+ ions. Such solid-state NMR techniques provide a novel approach to study new phosphors. (C) 2017 Elsevier B.V. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1016/j.jallcom.2017.04.198


全文传递服务