期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 182, 期 5, 页码 1045-1054出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2009.01.024
关键词
Solvothermal synthesis; Luminescence; LaPO4; Monodisperse
资金
- National Basic Research Program of China [2007CB935502]
- National Natural Science Foundation of China [NSFC 20871035, 50702057, 50872131, 00610227]
Monodisperse rare-earth ion (Eu3+, Ce3+, Tb3+) doped LaPO4 particles with oval morphology were successfully prepared through a facile solvothermal process without further hear 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 degrees 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 LapO(4):Ln has been investigated as well. Upon excitation by ultraviolet radiation, the LaPO4:EU3+ phosphors show the characteristic D-5(0)-F-7(1-4) emission lines of Eu3+, while the LaPO4:Ce3+, Tb3+ phosphors demonstrate the characteristic D-5(4)-F-7(3-6) emission lines of Tb3+. (C) 2009 Elsevier Inc. All rights reserved.
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