Controlled synthesis of high quality scandium-based nanocrystals as promising recyclable catalysts for silylcyanation reaction.

High quality (monodisperse and well-defined) scandium based ternary fluoride nanocrystals of NaScF and KScF were successfully fabricated via a one-pot colloidal synthesis method. These nanocrystals can play the part of hard Lewis acid catalysts by providing Lewis acid sites on account of the unique electronic structure, i.e.

Enhanced conversion efficiency in perovskite solar cells by effectively utilizing near infrared light.

Up-conversion β-NaYF4:Yb(3+),Tm(3+)/NaYF4 core-shell nanoparticles (NYF NPs) with a high luminous intensity in the visible light region were synthesized by a hydrothermal reaction process. Photocurrent densities of the mesoscopic perovskite solar cells fabricated by incorporating up-conversion NYF NPs into the electron transporting layer are effectively enhanced. The effects of the thicknesses of the electron transporting layer and the weight ratio of up-conversion NYF NPs/TiO2 on the power conversion efficiency (PCE) of the as-fabricated devices were also investigated.