Europium-activated rare earth fluoride (LnF(3):Eu3+-Ln=La, Gd) nanocrystals prepared by using ionic liquid/NH4F as a fluorine source via hydrothermal synthesis

Cited 5 time in webofscience Cited 0 time in scopus
  • Hit : 530
  • Download : 0
Lanthanide (Ln) fluorides are considered exceptional luminescent rigid host matrices for various optical active Ln(3+) ions due to their high refractive index, high chemical stability and low phonon energy, leading to the low probability of non-radiative decay, which results in higher photoluminescence quantum yield (PLQY) (usually higher than oxide hosts). In this study, Eu3+-activated Ln fluorides (LnF(3):Eu3+-Ln=La, Gd) are synthesized by the hydrothermal method using 1-butyl-3-methylimidazolium tertrafluoroborate [BMIBF4] and NH4F as fluorine precursors. The synthesized nanocrystals (NCs) are structurally and morphologically characterized, and their optical properties investigated using spectrofluorometry. The X-ray diffraction (XRD) patterns of Eu3+-substituted and -unsubstituted LnF(3) (prepared from a different fluorine source) are indexed based on the hexagonal and orthorhombic crystal structure, respectively. Average crystalline sizes are calculated using the Scherrer equation and it is found that the synthesized NCs have an average crystalline size of 12-35nm. Transmission electron microscopy (TEM) images reveal that the NCs are well dispersed and nearly ellipsoid, with an average size of similar to 5nm. Eu3+-activated NCs show characteristic excitation and emission spectra. The emission spectra show both magnetic (D-5(0)-F-7(1)) and electric (D-5(0)-F-7(2)) dipole transition with appropriate CIE color coordinates; however, the intensity of the magnetic dipole transition is high, which is in accordance with local site symmetry. Owing to their unique size and excellent optical properties, the synthesized NCs may have potential application in the fields bio-imaging and solar concentrators. Copyright (c) 2016 John Wiley & Sons, Ltd
Publisher
WILEY-BLACKWELL
Issue Date
2016-08
Language
English
Article Type
Article
Keywords

DOPED LAF3 NANOPARTICLES; LANTHANIDE FLUORIDES; TRIFLUORIDES; SPECTROSCOPY; CONVERSION; LN

Citation

LUMINESCENCE, v.31, no.5, pp.1138 - 1145

ISSN
1522-7235
DOI
10.1002/bio.3083
URI
http://hdl.handle.net/10203/212549
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0