Luminescent properties of Y ₂O ₃:Eu ³⁺ nanophosphor prepared from urea added precursor using flame spray pyrolysis

Y ₂2O ₃:Eu ³⁺ nanophosphor was synthesized by flame spray pyrolysis (FSP) from urea added nitrate based liquid precursor. In this study, urea serves as fuel and subsequently provides additional heat in the flame zone during the synthesis of phosphor particles. The end product shows cubic phase Y ₂O ₃:Eu ³⁺ nanophosphor successfully prepared by FSP without heat treatment. The influence of synthesis conditions such as different mol of urea and nitrate source materials in aqueous solution, and doping concentration on luminescent properties, were investigated. The characteristics of nanophosphor such as crystallinity and morphology under various experiments of conditions were carried out by x-ray diffraction (XRD) and field emission-scanning electron microscopy (FE-SEM). The particle size of product was found to be in the range of 20-30 nm from transmission electron microscopy (TEM). In photoluminescence (PL) properties, Y ₂O ₃:Eu ³⁺ nanophosphor emitted red light with a peak wavelength of 609 nm when excited with 398 nm wavelength photons.