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Under 980 nm laser excitation,red emission(5D0-7FJ(J=0,1,2)) of Eu3+ was observed in cubic Y2O3 codoped with Eu3+ and Yb3+.The dependence of the upconverted emission on doping concentration and laser power was studied.Yb3+ emission around 1000 nm(2F5/2-2F7/2) was reported upon excitation of Eu3+ ions.The decay curves of 5DJ(J=0,2) emission of Eu3+ under excitation of 266 nm pulse laser were examined to investigate the Eu3+→Yb3+ energy transfer process.Cooperative energy transfer process was discussed as the possible mechanism for the visible up-conversion luminescence of Eu3+ and near-infrared down-conversion emission of Yb3+.
Under 980 nm laser excitation, red emission (5D0-7FJ (J = 0,1,2)) of Eu3 + was observed in cubic Y2O3 codoped with Eu3 + and Yb3 + .the dependence of the upconverted emission on doping concentration and laser powerwas studied. Yb3 + emission around 1000 nm (2F5 / 2-2F7 / 2) was reported upon excitation of Eu3 + ions. The decay curves of 5DJ (J = 0,2) emission of Eu3 + under excitation of 266 nm pulse laser were examined to investigate the Eu3 + → Yb3 + energy transfer process. Cooperative energy transfer process was discussed as the possible mechanism for the visible up-conversion luminescence of Eu3 + and near-infrared down-conversion emission of Yb3 +.