Abstract:

One-dimensional CePO₄ micro-nanofibers doped with Dy³⁺ were prepared by using electrospinning technique and high-temperature calcinations. Their structures and optical properties were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA) and photoluminescence (PL) spectra. SEM images indicated that the diameters of fibers were reduced to 150nm when the samples were calcined at 1100℃.  XRD results showed that the crystallinity of CePO₄: Dy³⁺ micro-nanofibres become better with increased calcination temperature and the micro-nanocrystals are the monoclinic phase. The results of FTIR agreed well with the results of XRD. The PL spectra showed considerable enhancement of photoluminescence, especially the emission spectra ofCePO₄: Dy³⁺, which exhibited the characteristic emission of Dy³⁺ in ⁴F_9／2-⁶H_15／2and⁴F_9／2-⁶H_13／2 transitions and showed that the emission intensities increase with the concentration of Dy³⁺ increasing in the range of zero to 5.0 ％.

Key words:  CePO₄: Dy³⁺ ; micro-nanofibers; electrospinning; luminescence