Modulating upconversion luminescence through fluorescent dyes

作者：Hu, Junshan; Wu, Xiaofeng; Liu, Xiaojuan; Hu, Shigang; Zhan, Shiping; Hu, Pan; Wu, Shaobing; Zhang, Yanan; Liu, Yunxin^*

来源：Journal of Solid State Chemistry, 2017, 255: 139-144.

DOI：10.1016/j.jssc.2017.08.015

• Upconversion
• Violet light
• Fluorescent dye
• Core/shell
• Rare-earth

In our work, we report an effective method to tune the upconversion emission of NaGdF4:Yb3+,Er3+@NaYF4 core/shell nanoparticles. The shell thickness -dependent upconversion luminescence of NaGdF4:Yb3+,Er3+@ NaYF4 core/shell and the dye Rhodamine-B(RhB) composite were discussed in detail. It is found that the fluorescent dye RhB can remarkably improve the violet emission of the upconversion nanoparticles (UCNPs) and simultaneously generating the 605 nm yellow emission through energy transfer. Importantly, it is revealed that the effective energy transfer distance between upconversion nanoparticles and RhB is shorter than 18 nm in the media of NaYF4. These results open a novel way for determining the energy transfer distance between the upconversion nanoparticles and the dyes and simultaneously tuning the emission brightness and the spectrum covering range of the upconversion nanoparticles for meeting the requirement in the application fields of light source, colorful display, biological imaging, and fluorescent probes.

• 出版日期2017-11
• 单位湖南科技大学