Sol-gel synthesis and photoluminescence characterization of La_2Ti_2O_7:Eu^(3+) nanocrystals

摘要

Eu3+ doped La2Ti2O7 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 transmis-sion electron microscopy(TEM) were employed to characterize the as-synthesized nanoparticles.Furthermore,photoluminescence(PL) performances of the Eu3+ doped La2Ti2O7 nanocrystals were evaluated with focus on the effects of calcination temperature and Eu3+ doping concentration on the photoluminescence properties.