Yellow luminescence of co-doped gadolinium oxyhydroxide

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+.

Photographs of as-grown crystals of Gd0.98Eu0.02OOH (a) and Gd0.98Eu0.02–xTbxOOH (b–f) crystals under 254 nm irradiation of 1.1 mW/cm2 (a) x=0; (b) x=0;(c) x=0.005; (d) x=0.010; (e) x=0.015; (f) x=0.020Figure optionsDownload as PowerPoint slide