Upconversion Luminescence Properties of Mn^(2+)-Doped NaYF_4:Yb/Er Nanoparticles

摘要

NaYF 4:Yb/Er upconversion nanoparticles doped with Mn 2+ were synthesized by hydrothermal method.The upconversion photoluminescence measured by 975 nm continuous wave laser indicates that the as-synthesized samples generated green and red color emission with various intensity ratio ranging from 3.25 to 548.35,which is highly correlative to the dopant concentration of Mn 2+.However,there is no red emission enhancement observed in Cu 2+-doped NaYF 4:Yb/Er nanoparticles.