Sol-gel growth of Gd2MoO6 : Eu3+ nanocrystalline layers on SiO2 spheres (SiO2@Gd2MoO6 : Eu3+) and their luminescent properties
作者： Guangzhi Li , Zhenling Wang , Zewei Quan , Xiaoming Liu , Min Yu
DOI: 10.1016/J.SUSC.2006.06.018
关键词: Fourier transform infrared spectroscopy 、 Photoluminescence 、 Transmission electron microscopy 、 Annealing (metallurgy) 、 Nanocrystalline material 、 Materials science 、 Phosphor 、 Crystallinity 、 Analytical chemistry 、 Luminescence
摘要: SiO2@Gd2MoO6:EU3+ core-shell phosphors were prepared by the sol-gel process. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive spectra (EDS), transmission ITEM), photoluminescence (PL) as well kinetic decays used to characterize resulting SiO2@Gd2MoO6:Eu3+ phosphors. The XRD results demonstrate that Gd2MoO6:Eu3+ layers on SiO2 spheres begin crystallize after annealing at 600 degrees C and crystallinity increases with raising temperature. obtained have a near perfect spherical shape narrow size distribution (average ca. nm), are not agglomerated, smooth surface. thickness of shells cores could be easily tailored varying number deposition cycles (50 nm for four cycles). Eu3+ shows strong PL luminescence (dominated D-5(0)-F-7(2) red 613 nm) under excitation 307 UV light.
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