Solvothermal Synthesis ofGd2O3 : Eu3+Luminescent Nanowires

[摘要] UniformGd2O3 : 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 phaseGd(OH)3crystals, and the samples calcined at 800C°are cubic phaseGd2O3. 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 ofD50→F72toD50→F71transition peak of the calcined samples is stronger than that of the precursors, which confirmed that the color purity of theGd2O3 : Eu3+is better than that of the precursors. The as-obtainedGd2O3 : Eu3+luminescent nanowires show a strong red emission corresponding toD50→F72transition (610 nm) ofEu3+under ultraviolet excitation (250 nm), which have potential application in red-emitting phosphors and field emission display devices.

[学科分类] 材料工程