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ABSTRACT: In the present study, nearly-uniform spherical-shaped dysprosium-doped cubic yttrium-oxide
nanoparticles were prepared by using the urea homogeneous precipitation method. X-ray diffraction
patterns of synthesized particles confirmed the formation of a pure cubic phase of Y2O3. The
morphology and the elemental analysis measurements were carried out using a transmission electron
microscope and a field-emission scanning electron microscope. The particles were observed to
have average sizes of around 110 nm. In order to select the optimum concentration of the Dy3+
dopant in the samples, we measured the strongest yellow emission peak intensity due to the strong
4F9/2-6H13/2 transition (573 nm) as a function of the Dy-ion dopant concentration under a constant
349 nm excitation. The PL results showed that the strongest yellow emission at 573 nm occurred
when the dopant concentration was about 1% in mol equivalent. Y2O3:Dy3+ phosphor can be used
for applications in security printing, biolabel technology, lamps for illumination purposes, etc.
Journal- Korean Physical Society 01/2012; 60(2):244-248. · 0.45 Impact Factor
