Fabrication and luminescent properties of CaWO^sub 4^:Ln^sup 3+^ (Ln = Eu, Sm, Dy) nanocrystals

Scheelite CaWO^sub 4^ doped with rare earth ions (Eu^sup 3+^, Sm^sup 3+^, Dy^sup 3+^) were fabricated via a facile solvothermal process without further heat treatment, which used sodium oleate and oleylamine as capping reagent. The structure, morphology, and optical properties of the samples were we...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2010-08, Vol.12 (6), p.2295
Main Authors: Wang, Wenxin, Yang, Piaoping, Gai, Shili, Niu, Na, He, Fei, Lin, Jun
Format: Article
Language:English
Subjects:
Emissions
Fabrication
Fourier transforms
Heat treatment
Infrared spectroscopy
Nanocrystals
Nanoparticles
Optical properties
Ultraviolet radiation
X-ray diffraction
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Summary:Scheelite CaWO^sub 4^ doped with rare earth ions (Eu^sup 3+^, Sm^sup 3+^, Dy^sup 3+^) were fabricated via a facile solvothermal process without further heat treatment, which used sodium oleate and oleylamine as capping reagent. The structure, morphology, and optical properties of the samples were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), high-resolution transmission electron microscope (HRTEM), X-ray photoelectron spectra (XPS), photoluminescence (PL) spectra and cathodoluminescence (CL). The XRD results reveal that all the doped samples are well assigned to the scheelite structure of the CaWO^sub 4^ phase. Upon excitation by ultraviolet radiation, the CaWO^sub 4^:Eu^sup 3+^ phosphors show the characteristic ^sup 5^D^sub 0^-^sup 7^F^sub 1-3^ emission lines of Eu^sup 3+^, and the CaWO^sub 4^:Sm^sup 3+^ phosphors demonstrate the characteristic ^sup 4^G^sub 5/2^-^sup 6^H^sub 5/2-9/2^ emission line of Sm^sup 3+^, and the CaWO^sub 4^:Dy^sup 3+^ phosphors demonstrate the characteristic ^sup 4^F^sub 9/2^-^sup 6^H^sub 13/2-15/2^ emission line of Dy^sup 3+^.[PUBLICATION ABSTRACT]
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-010-9850-4