Photoluminescent properties of Eu³⁺ and Tb³⁺ codoped Gd₂O₃ nanowires and bulk materials

李富海，刘海，魏水林，孙伟，于立新

Department of Materials Science and Engineering, Nanchang University

摘 要：In this paper,the Gd2O3:Eu3+,Tb3+phosphors with different doping concentrations of Eu3+and Tb3+ions were prepared by a hydrothermal method for nanocrystals and the solid-phase method for microcrystals.The interaction of the doped ions with different concentrations and the luminescent properties of the nanocrystals and microcrystals were studied systematically.Their structure and morphology of Gd2O3:Eu3+,Tb3+phosphors were analyzed by means of X-ray powder diffraction（XRD）,transmission electron microscopy（TEM）and scanning electron microscopy（SEM）.The photoluminescence（PL）properties of Gd2O3:Eu3+,Tb3+phosphors were also systematically investigated.The results indicated that when the concentration of doped Eu3+was fixed at 1 mol.%,the emission intensity of Eu3+ions was degenerating with Tb3+content increasing,while when the Tb3+content was fixed at 1 mol.%,the emission intensity of Tb3+ions reached a maximum when the concentration of Eu3+was 2 mol.%,implying that the energy transfer from Eu3+to Tb3+took place.In addition,Tb3+could inspire blue-green light and the Eu3+could inspire red light.Therefore co-doping systems by controlling the doping concentration and the hosts are the potential white emission materials.

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