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Synthesis and Luminescence of Hollow Spherical Eu3+- or Tb3+-Doped MgAl2O4 Phosphors

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Abstract:

Eu3+- or Tb3+-doped MgAl2O4 hollow spheres have been successfully synthesized via facile hydrothermal method by using carbon spheres as template followed by a subsequent heat treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results showed that the hollow microspheres possessed diameters in the range of 1∼2.5 μm and shell thickness of 60∼80 nm. A possible formation mechanism for hollow spheres was proposed. MgAl2O4:Eu3+ show strong red emission at 619 nm corresponding to the forced electric dipole 5D07F2 transition of Eu3+, and MgAl2O4:Tb3+ exhibit strong green emission at 545 nm corresponding to 5D47F5 transition of Tb3+.

Keywords: DOPING; HOLLOW SPHERE; LUMINESCENCE; MGAL2O4

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1794

Publication date: January 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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