Key Words:Luminescence;Materials science - Optical materials;Hydrothermal methods - Luminescence properties - Reaction temperature - Rod-shaped - TEM images - Up-conversion
Abstract:NaYF<inf>4</inf>:Yb<sup>3+</sup>/Er<sup>3+</sup>nanocrystals were prepared using a hydrothermal method. The products were characterized by XRD, SEM, TEM, HRTEM, and photoluminescence (FL). The XRD results indicated that the sample"s phase transformed from cubic to hexagonal when EDTA was added at low reaction temperatures. The SEM results revealed that the products were transformed from granular to rod-shaped with an increase in temperature. TEM images revealed the diameter of sample prepared at 120°C is about 10-50nm. HRTEM showed that crystals prepared at 120°C grew along {111} surfaces. The PL results indicated that samples prepared at 180°C without EDTA have the strongest luminescence property. © 2016 Optical Society of America.
Volume:6
Issue:4
Translation or Not:no
