Synthesis and investigation of luminescence properties of Eu3+-doped cubic perovskite Ba3Y2WO9

Abstract Eu 3+ -doped cubic double perovskite Ba 3 Y 2 WO 9 phosphors have been firstly successfully synthesized by sol–gel method. The prepared samples were characterized by X-ray diffraction (XRD) and field emission-scanning electron microscopy (FE-SEM). The luminescence excitation and emission spectra in the ultraviolet–visible (UV) region were used to investigate the luminescence properties of these phosphors. Then the site-selective excitation and emission spectroscopy along with luminescence decay have been investigated in the 5 D 0  →  7 F 0 region under a pulsed, tunable, narrowband dye laser at room temperature. In our study, the crystallographic occupations of Eu 3+ ions were explored based on both spectroscopy and crystal structure of cubic Ba 3 Y 2 WO 9 :Eu 3+ . The multiple site structure of Eu 3+ ions with highly disordered distributions in cubic Ba 3 Y 2 WO 9 lattices was suggested. The results help us to understand the site assignments of rare earth ions doped in cubic Ba 3 Y 2 WO 9 .