Optical Properties of LiIn(1−x)‎Tmx(WO4)‎2 Blue Phosphor

Abstract EN

LiIn1−xTmx(WO4)2 (x=0, 0.5, 1, 5, and 10 at.%) polycrystalline powders blue phosphors were prepared via the classical solid-state reaction method.

X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence excitation, and emission spectra were used to characterize LiIn1−xTmx(WO4)2 phosphors.

By analyzing the excitation and emission spectra of LiIn1−xTmx(WO4)2 samples, the result indicates that there exists the energy transfer only from the WO42− group to the 1G4 energy level of Tm3+ ion.

On the other hand, the influence of the thulium concentration on the blue emission transition 1D2→3F4 and 1G4→3H6 and the emission of WO42− group are investigated.