期刊
NANOMATERIALS
卷 8, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/nano8121023
关键词
NaYF4:Yb/Er@NaYF4:Ce/Tb/Eu microrods; dual-mode emission; time-resolved emission spectra; multicolor emission
类别
资金
- Nature Science Foundation of China [11674183, 11811530075]
- Natural Science Foundation of Tianjin, key project [17JCZDJC37800]
- 111 Project [B07013]
The dual-mode emission and multicolor outputs in the time domain from core-shell microcrystals are presented. The core-shell microcrystals, with NaYF4:Yb/Er as the core and NaYF4:Ce/Tb/Eu as the shell, were successfully fabricated by employing the hydrothermal method, which confines the activator ions into a separate region and minimizes the effect of surface quenching. The material is capable of both upconversion and downshifting emission, and their multicolor outputs in response to 980 nm near-infrared (NIR) excitation laser and 252 nm, and 395 nm ultraviolet (UV) excitation light have been investigated. Furthermore, the tunable color emissions by controlling the Tb3+-Eu3+ ratio in shells and the energy transfer of Ce3+ -> Tb3+ -> Eu3+ were discussed in details. In addition, color tuning of core-shell-structured microrods from green to red region in the time domain could be obtained by setting suitable delay time. Due to downshifting multicolor outputs (time-resolved and pump-wavelength-induced downshifting) coupled with the upconversion mode, the core-shell microrods can be potentially applied to displays and high-level security.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据