Synthesis and Luminescence of Y₂O₃:Eu³⁺ Nanoparticles by the Coprecipitation

Abstract

The Y₂O₃:Eu³⁺ nano-phosphors were synthesized by coprecipitation with the addition of oleic acid. The XRD pattern and TEM images show that the obtained Y₂O₃:Eu³⁺ samples are spherical nanoparticles with the body centered cubic structure. Upon excitation into the CTB of Eu³⁺ ions at 266 nm, Y₂O₃:Eu³⁺ samples show the characteristic emission spectra of Eu³⁺ ions originating from the ⁵D₀ → ⁷F_j transitions. The corresponding luminescence decay times can be fitted well with a single exponential decay curve. The emission intensity increases with the increase of Eu³⁺ doped concentration, but the luminescence lifetime is just opposite to it.

Keywords:

• Y₂O₃:Eu³⁺
• Coprecipitation
• microspheres
• luminescence