期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 6, 页码 3096-3102出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.12.008
关键词
LaPO4; Solvothermal synthesis; Luminescence; Oleic acid
资金
- National Natural Science Foundation of China [NSFC 20871035]
- China Postdoctoral Special Science Foundation [200808281]
- Harbin Sci-Tech Innovation Foundation [2009RFQXG045]
LaPO4:Ln(3+) (Ln = Eu, Ce, Tb) nanocrystals were successfully synthesized via a facile solvothermal process in the presence of oleic acid. The as-prepared crystals were well characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), optical spectra as well as the kinetic decay times, respectively. In the synthesis process, oleic acid as a surfactant has played a crucial role in confining the growth and size of the LaPO4:Ln(3+) phosphors. All the samples are well crystallized and assigned to the monoclinic monazite-type structure of the LaPO4 phase. The prepared LaPO4:Ln(3+) phosphors present a narrow distribution with an average particle size of about 15 nm. Upon excitation by ultraviolet radiation, the LaPO4:Eu3+ phosphors show the characteristic D-5(0)-F-7(1-3) emission lines of Eu3+, while the LaPO4:Ce3+,Tb3+ exhibits the characteristic D-5(0)-E-7(3-6) emission lines of Tb3+. It is believed that these rare earth ion doped (Eu3+ ion or Ce3+ and Tb3+ ions co-doped) monoclinic monazite-type LaPO4 nanocrystals could find potential application as future advanced optical materials. (C) 2010 Elsevier B.V. All rights reserved.
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