Solvothermal Synthesis of Gd2O3 : Eu3+ Luminescent Nanowires

Abstract EN

Uniform Gd2O3 : Eu3+ luminescent nanowires were prepared on a large scale by a facile solvothermal method using polyethylene glycol (PEG-2000) as template and ethanol as solvent; the properties and the structure were characterized.

X-ray diffraction (XRD) patterns and Fourier transform infrared spectrometry (FTIR) showed that the precursors are hexagonal phase Gd(OH)3 crystals, and the samples calcined at 800C° are cubic phase Gd2O3.

Transmission Electron Microscopy (TEM) images indicated that the samples are nanowires with a diameter of 30 nm and a length of a few microns.

Photoluminescence (PL) spectra showed that the ratio of D50→F72 to D50→F71 transition peak of the calcined samples is stronger than that of the precursors, which confirmed that the color purity of the Gd2O3 : Eu3+ is better than that of the precursors.

The as-obtained Gd2O3 : Eu3+ luminescent nanowires show a strong red emission corresponding to D50→F72 transition (610 nm) of Eu3+ under ultraviolet excitation (250 nm), which have potential application in red-emitting phosphors and field emission display devices.