Abstract
Red-emitting Y 2 O 3 :Eu 3+ and green-emitting Y 2 O 3 :Tb 3+ and Y 2 O 3 :Eu 3+ , Tb 3+ nanorods were synthesized by hydrothermal method. Their structure and micromorphology have been analyzed by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). The photoluminescence (PL) property of Y 2 O 3 :Eu 3+ ,Tb 3+ phosphor was investigated. In the same host (Y 2 O 3 ), upon excitation with ultraviolet (UV) irradiation, it is shown that there are strong emissions at around 610 and 545 nm corresponding to the forced electric dipole 5 D 0 – 7 F 2 transition of Eu 3+ and 5 D 4 – 7 F 5 transition of Tb 3+ , respectively. Different qualities of Eu 3+ and Tb 3+ ions are induced into the Y 2 O 3 lattice. From the excitation spectrum, we speculate that there exists energy transfer from Tb 3+ to Eu 3+ ions .The emission color of powders reveals regular change in the separation of light emission. These powders can meet with the request of optical display material for different colors or can be potentially used as labels for biological molecules.
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