Synthesis, studies on properties of Eu3+/Dy3+ co–doped BaMoO4 nanophosphors via hydrothermal method

Abstract The article shows the outstanding properties and luminescence ability of Eu 3+ /Dy 3+ co–doped BaMoO 4 (BMED) materials, which have been successfully fabricated by the hydrothermal method. The crystalline structure analysis of BMED nanophosphor by X–ray diffraction (XRD) shows that it has a structure single–phase structure, with tetragonal BaMoO 4 (JCPDS 029–0193), consist of spherical nanoparticles with a size diameter of 31.79–52.99 nm. The characteristic vibrational modes of molybdate lattice in the Raman spectroscopy confirmed the successful Eu 3+ /Dy 3+ co–doped into the host matrix. The field emission scanning electron microscopy (FE–SEM) image shows that the BMED consists of quite uniform nanoparticle with sizes less than 50 nm. The energy dispersive spectra (EDS) confirm the purity and uniform distribution of elements Eu, Dy, Mo, O, Ba throughout in the solid sample. The BMED nanophosphor has is small bandgap from 2.83 to 3.00 eV. The photoluminescence spectra show that BMED have strong red emission at 616 nm of the transition ( 5 D 0 → 7 F 2 ) with luminescence lifetime from 0.330 to 1.429 ms. The BMED nanophosphor have potential application for the production of warm wLEDs, agricultural lighting and biomedical marking.