Upconversion luminescence enhancement of Yb3+, Nd3+ sensitized NaYF4 core–shell nanocrystals on Ag grating films†
Abstract
Here, we report the wavelength-dependent and angle-dependent upconversion luminescence (UCL) enhancement of NaYF4:Yb3+,Tm3+@NaYF4:Yb3+,Nd3+ core–shell nanocrystals (NCs) resulting from Ag grating structures, which provides a novel insight for improving UCL.