Fabrication and Luminescence Properties of La2O2S:Tb3+ Hollow Nanofibers

La 2 O 2 S:Tb 3+ hollow nanofibers were successfully fabricated by sulfurization of the relevant La 2 O 3 :Tb 3+ hollow nanofibers via double-crucible method. The morphology and properties of the products were investigated in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectrometry. La 2 O 2 S:Tb 3+ hollow nanofibers were pure hexagonal phase with space group P m 1 and were hollow-centered structure with the mean diameter of 160.03 ± 17.74 nm. Emission spectra indicate that La 2 O 2 S:Tb 3+ hollow nanofibers emit green light at 544 nm attributed to 5 D 4 → 7 F 5 energy levels transition of Tb 3+ ions. CIE analysis demonstrated that the light emitted by La 2 O 2 S:Tb 3+ hollow nanofibers corresponds to the green region, and color-tuned luminescence can be obtained by changing concentration of Tb 3+ ions. The obtained material could be applied in the field of optical telecommunication and optoelectronic devices. The possible formation mechanism of La 2 O 2 S:Tb 3+ hollow nanofibers was also proposed.