LAUSR

La0.67Mg0.5W0.5O3:Tb3+ (LMWO:Tb3+) green phosphors with multiple-cell perovskite-structure were prepared by the high temperature solid state reaction. The phase, morphology and luminescent properties of (LMWO:Tb3+) green phosphors were investigated by X-ray diffraction, scanning electron microscopy, and photoluminescence spectra. The excitation spectra vary with the Tb3+ concentration and consist of an intense charge transfer bands of O2−–Tb3+ (240–300 nm), O2−–W6+ (290–340 nm) and weak intra-4f8 transition absorption peaks of Tb3+ ions (340–400 nm). Among them, O2−–W6+ charge transfer band centered at 310 nm exhibits the strongest. WO66− group of LMWO can efficiently absorb ultraviolet light and transfer the energy to the Tb3+. The photoluminescence spectra, excited at the peak wavelengths of O2−–W6+ charge transfer bands, consist of the characteristic Tb3+ emission transitions from 5D3 and 5D4 excited levels to 7FJ (J = 3–6) levels. The CIE chromaticity coordinates for these phosphors were located in the green region. The phosphor could act as a candidate for the potential application in UV excited white-LEDs lighting.