Abstract
A novel orange-emitting tungstate of Eu3+-doped Ba4R2ZrWO12 (R=La, Gd, Y) was successfully synthesized. The samples were characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM). The luminescence properties such as photoluminescence (PL) excitation and emission spectra, decay curves, CIE color coordinates and quantum efficiency (QE) were investigated. The thermal stability was discussed from the luminescence decay and lifetimes. The 5D0→7F0 transition of Eu3+ is abnormally stronger than the 5D0→7F1,2 transitions. The tungstate can be efficiently excited by UV and near-UV light and exhibits a bright orange luminescence. The luminescence mechanism was briefly discussed.
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