Photoluminescence properties of Bi₂MoO₆:Dy³⁺ phosphors fabricated by solid state reactions Free

In this work, Bi₂MoO₆ and Bi_(2-x)Dy_xMoO₆ (x = 0.05, 0.10, 0.15 and 0.20 % by mol) phosphors were synthesized by high- temperature solid-state reaction method. The finely powdered mixtures were sintered at 500, 550, 600, 650 and 700 °C for 12 h in air atmosphere. The structural characteristics of Bi₂MoO₆ phosphors were examined and confirmed by X-ray diffraction (XRD). The optical spectra were measured and confirmed signature peaks of Dy³⁺ ions in Bi₂MoO₆ phosphors. The emission spectra of phosphors exhibited emission bands at 482, 575, 663 and 750 nm corresponding to ⁶H_15/2, ⁶H_13/2, ⁶H_11/2 and ⁶H_9/2 transitions from the ground state (⁴F_9/2). The emission of Bi_(2-X)Dy_XMoO₆ (x= 0.10) was shown greendish-yellow color, calculated by CIE 1931 color coordinate.