Eu3+ Spectroscopy: A Structural Probe for Yttrium Orthoborate Phosphors. Jia, G., Tanner, P. A., Duan, C., & Dexpert-Ghys, J. Journal of Physical Chemistry C, 114(6):2769--2775, February, 2010. doi abstract bibtex Yttrium orthorborate YBO3 containing 0.5 or 5 atom % of Eu3+ has been prepared by the spray-pyrolysis method. Low-temperature, high-resolution emission spectroscopy has been used to probe the local site symmetries of Eu3+ ions accommodated on the Y3+ sites in YBO3:Eu3+ (0.5 atom %) and hence to determine the crystal structure of the title compound. The use of point group selection rules enabled a consistent spectral interpretation by envisaging distinct C-i and C-1 symmetry Eu3+ sites, in accordance with the neutron diffraction study of Lin et al. (Chem. Mater. 2004, 16, 2418). The assignment of features in the 10 K visible absorption spectrum of YBO3:Eu3+ (5 atom %) is also consistent with the two-site model, but it was found that the site occupation by Eu3+ differs from the expected ratio 2C(1):1C(i). The fitting of 31 crystal-field levels of the C-1 site has been made with some approximations by employing 7 parameters. In addition, the emission spectrum of YBO3:Eu3+ containing a trace amount of Y3BO6 has been compared with those of YBO3:Eu3+ and Y3BO6: Eu3+, which serves as a reference to elucidate the concern on the red/orange color ratio of YBO3:Eu3+ emission.
@article{ jia_eu3+_2010,
title = {Eu3+ Spectroscopy: A Structural Probe for Yttrium Orthoborate Phosphors},
volume = {114},
issn = {1932-7447},
shorttitle = {Eu3+ Spectroscopy},
doi = {10.1021/jp910329k},
abstract = {Yttrium orthorborate {YBO3} containing 0.5 or 5 atom % of Eu3+ has been prepared by the spray-pyrolysis method. Low-temperature, high-resolution emission spectroscopy has been used to probe the local site symmetries of Eu3+ ions accommodated on the Y3+ sites in {YBO3:Eu3+} (0.5 atom %) and hence to determine the crystal structure of the title compound. The use of point group selection rules enabled a consistent spectral interpretation by envisaging distinct C-i and C-1 symmetry Eu3+ sites, in accordance with the neutron diffraction study of Lin et al. (Chem. Mater. 2004, 16, 2418). The assignment of features in the 10 K visible absorption spectrum of {YBO3:Eu3+} (5 atom %) is also consistent with the two-site model, but it was found that the site occupation by Eu3+ differs from the expected ratio {2C(1):1C(i).} The fitting of 31 crystal-field levels of the C-1 site has been made with some approximations by employing 7 parameters. In addition, the emission spectrum of {YBO3:Eu3+} containing a trace amount of {Y3BO6} has been compared with those of {YBO3:Eu3+} and {Y3BO6:} Eu3+, which serves as a reference to elucidate the concern on the red/orange color ratio of {YBO3:Eu3+} emission.},
language = {English},
number = {6},
journal = {Journal of Physical Chemistry C},
author = {Jia, Guohua and Tanner, Peter A. and Duan, Chang-Kui and Dexpert-Ghys, Jeannette},
month = {February},
year = {2010},
keywords = {earth, ions, luminescent properties, microstructure, phase-transition, spectra, spray, ybo3-eu nanocrystals},
pages = {2769--2775}
}
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