Electrospinning Preparation and Photoluminescence Properties of Y₃Al₅O₁₂:Eu³⁺ Nanobelts

Novel structures of Y₃Al₅O₁₂: Eu³⁺ (denoted as YAG: Eu³⁺ for short) nanobelts were fabricated by calcination of the electrospun PVP/[Y(NO₃)₃+Eu(NO₃)₃+Al(NO₃)₃] composite nanobelts. X-ray powder diffraction (XRD) analysis showed that YAG: Eu³⁺ nanobelts were cubic in structure with space group I_a3d. Fourier transform infrared spectroscopy (FTIR) analysis manifested that pure YAG: Eu³⁺ nanobelts were formed at 900 °C. Scanning electron microscope (SEM) analysis indicated that the YAG: Eu³⁺ nanobelts have coarse surface. The width and thickness of YAG: Eu³⁺ nanobelts were ca. 3.25 µm and ca. 220 nm, respectively. Fluorescence spectra analysis revealed that YAG: Eu³⁺ nanobelts emitted the main strong emission centering at 592 nm under the ultraviolet excitation of 235 nm, which was attributed to ⁵D₀→⁷F₁ of Eu³⁺, and the optimum doping molar concentration of Eu³⁺ ions was 5%. CIE analysis demonstrated that the emitting colors of YAG: Eu³⁺ nanobelts could be tuned by adjusting doping concentration of Eu³⁺. The possible formation mechanism of YAG: Eu³⁺ nanobelts was also proposed.

electrospinning; YAG: Eu³⁺; nanobelts; phosphor