Abstract
Crystals of co-doped gadolinium oxyhydroxide (GdOOH), Gd0.98Eu0.02–xTbxOOH and Gd1–y–zDyyBizOOH, were synthesized by a flux method. The color coordinates in the Commission Internationale de I'Eclairage (CIE) chromaticity diagram of Gd0.98Eu0.02–xTbxOOH, obtained under 254 nm irradiation, shifted along a straight line with the changing values of x to include the yellow region. The CIE coordinates of Dy3+ doped in GdOOH were located in the yellow region, while the emission intensity of Dy3+ under 286 nm irradiation increased by more than 40 times when co-doped with Bi3+.
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