Luminescent Properties of Eu3+-Doped BaGd2ZnO5 Phosphors for White LED
BaGd2ZnO5:Eu3+ phosphors were synthesized at sintering temperatures of 800, 900, 1000, 1100 and 1200 °C by high-energy ball milling method. The crystallinity, surface morphology and photoluminescence properties of phosphors were investigated by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and luminescence spectrophotometry, respectively. The XRD results indicate that the crystallinity of the powder was improved and the powder shows a orthorhombic structure as the sintering temperature increased. The emission spectra of BaGd2ZnO5 phosphors excited at 280 nm exhibit a series of shaped peaks assigned to the 5D0→7FJ (J=0, 1, 2, 3) transitions, and luminescence intensity was increased with increasing sintering temperature. The FE-SEM images indicate that the size and shape of particles are regular.
Chunliang Zhang and Liangchi Zhang
H. M. Noh et al., "Luminescent Properties of Eu3+-Doped BaGd2ZnO5 Phosphors for White LED", Key Engineering Materials, Vols. 531-532, pp. 22-26, 2013