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Synthesis and Characterization of Luminescent Yttrium Oxide Doped with Tm and Yb
Author(s) -
Graeve Olivia A.,
Varma Shailaja,
RojasGeorge Gabriel,
Brown David R.,
Lopez Enrique A.
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.00845.x
Subject(s) - phosphor , yttrium , photoluminescence , luminescence , materials science , impurity , nanocrystalline material , activator (genetics) , analytical chemistry (journal) , doping , fourier transform infrared spectroscopy , oxide , emission intensity , diffraction , mineralogy , nuclear chemistry , chemical engineering , chemistry , nanotechnology , optics , optoelectronics , metallurgy , biochemistry , physics , organic chemistry , chromatography , engineering , gene
Combustion synthesis was used to obtain nanocrystalline Y (2− x − y ) Tm x Yb y O 3 blue‐emitting phosphors. From X‐ray diffraction (XRD) it was determined that the powders in the as‐synthesized state were in a state of high strain. Upon thermal treatment, the strain in the lattice decreased, which resulted in an improvement in the photoluminescence emission intensity of these phosphors. Fourier‐transform infrared spectrometry analysis showed that there is a negligible difference in the absorbed impurities with heat‐treatment temperature and time. Hence, it was concluded that the surface impurities do not play a role in the increase in luminescence intensity of these phosphors. The optimum activator concentrations were determined to be approximately x =0.02 and y =0.01.