Solvothermal synthesis and luminescent properties of monodisperse LaPO4:Ln (Ln=Eu, Ce, Tb) particles |
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| Authors: | Piaoping Yang Zewei Quan Zhiyao Hou Jun Lin |
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| Institution: | a State Key laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
b College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China |
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| Abstract: | Monodisperse rare-earth ion (Eu3+, Ce3+, Tb3+) doped LaPO4 particles with oval morphology were successfully prepared through a facile solvothermal process without further heat treatment. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectra and the kinetic decays were performed to characterize these samples. The XRD results reveal that all the doped samples are well crystalline at 180 °C and assigned to the monoclinic monazite-type structure of the LaPO4 phase. It has been shown that all the as-synthesized samples show perfectly oval morphology with narrow size distribution. The possible growth mechanism of the LaPO4:Ln has been investigated as well. Upon excitation by ultraviolet radiation, the LaPO4:Eu3+ phosphors show the characteristic 5D0−7F1-4 emission lines of Eu3+, while the LaPO4:Ce3+, Tb3+ phosphors demonstrate the characteristic 5D4−7F3-6 emission lines of Tb3+. |
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| Keywords: | Solvothermal synthesis Luminescence LaPO4 Monodisperse |
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