of beta-NaYF4: Yb3+, Er3+ NPs were obtained using X-ray diffraction (XRD), scanning electron microscopy (SEM), and fluorescence spectral measurements, respectively; the mechanism for the energy transfer has been suggested with emphasis on the optimized Er/Yb concentration for most efficient UC....
Single phase beta-NaY0.8-xGdxYb0.18Er0.02F4 nanoparticles with different concentrations of gadolinium ions were prepared via PVP-assisted solvothermal treating at 200 degrees C (PVP- polyvinylpyrrolidone). With the increase in Gd3+ concentration, size of the nanoparticles decreased. The up-converting ...
The up-conversion luminescence efficiency of heterogeneous hetero-phase alpha-NaLuF4:Yb/Er@ beta-NaYF4:Yb core-shell structure nanocrystals is highest when the Yb3+ ion concentration in core and shell is the same. In addition, the population of up-conversion red emission can be influenced by ...
Influence of Cr 3+ ions doping on growth and upconversion luminescence properties of β-NaYF 4 :Yb 3+ /Er 3+ microcrystals[J] . Chuanying Wang,Xianhua Cheng.Journal of Alloys and Compounds . 2015