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

摘要

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 characterizeLiIn1−xTmx(WO4)2phosphors. By analyzing the excitation and emission spectra ofLiIn1−xTmx(WO4)2samples, the result indicates that there exists the energy transfer only from theWO42−group to the1G4energy level ofTm3+ion. On the other hand, the influence of the thulium concentration on the blue emission transition1D2→3F4and1G4→3H6and the emission ofWO42−group are investigated.