Doping Lanthanide Nanocrystals With Non-lanthanide Ions to Simultaneously Enhance Up- and Down-Conversion Luminescence.

ABSTRACT: The rare-earth nanocrystals containing Er³⁺ emitters offer very promising tools for imaging applications, as they can not only exhibit up-conversion luminescence but also down-conversion luminescence in the second near-infrared window (NIR II). Doping non-lanthanide cations into host matrix was demonstrated to be an effective measure for improving the luminescence efficiency of Er³⁺ ions, while still awaiting in-depth investigations on the effects of dopants especially those with high valence states on the optical properties of lanthanide nanocrystals. To address this issue, tetravalent Zr⁴⁺ doped hexagonal NaGdF₄:Yb,Er nanocrystals were prepared, and the enhancement effects of the Zr⁴⁺ doping level on both up-conversion luminescence i

SUBMITTER: Li Y 

PROVIDER: S-EPMC7538674 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature