Sol-gel synthesis and photoluminescence characterization of La 2 Ti 2 O 7 :Eu 3+ nanocrystals

Eu 3+ doped La 2 Ti 2 O 7 nanocrystals with pure monoclinic phase and size of about 100 nm were prepared by a citric acid (CA) assisted sol-gel method. Techniques of thermo-gravimetric (TG) and differential scanning calorimetry (DSC), X-ray diffraction (XRD), as well as transmission electron microscopy (TEM) were employed to characterize the as-synthesized nanoparticles. Furthermore, photoluminescence (PL) performances of the Eu 3+ doped La 2 Ti 2 O 7 nanocrystals were evaluated with focus on the effects of calcination temperature and Eu 3+ doping concentration on the photoluminescence properties.