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Título del libro: Technical Proceedings Of The 2014 Nsti Nanotechnology Conference And Expo, Nsti-Nanotech 2014
Título del capítulo: Synthesis of nanocrystalline cubic ZrO2:Mn2+ phosphors: Structural and luminescent properties

Autores UNAM:
ANA LETICIA FERNANDEZ OSORIO; JULIAN CHAVEZ FERNANDEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2014
Palabras clave:

Crystallite size; Emission spectroscopy; Luminescence; Manganese; Nanotechnology; Oxygen vacancies; Phosphors; Rietveld refinement; Sol-gel process; Sol-gels; Solid solutions; X ray powder diffraction; Zirconia; Cubic zirconia; Excitation and emission spectra; Excitation wavelength; Luminescence properties; Luminescent property; Photoluminescent spectra; Transmission electronic microscopies; ZrO2 nanoparticles; Nanocomposite films


Resumen:

Nanocrystalline cubic zirconia doped with manganese, solid solutions of Zr1-xMnxO2-x/2 (x=0, 0.1, 0.2 and 0.4), were prepared by the sol-gel method. The Rietveld refinement of the X-ray powder diffraction (XRD) profile of the samples confirms the stabilization of zirconia in the cubic phase, and the data show the presence of the solid solution as well as oxygen vacancies in the lattice. The crystallite average size of this system is 5.0±2.0 nm, as determined by XRD, which is in close agreement with the particle size determined by high-resolution transmission electronic microscopy (HRTEM). The luminescence properties of these nanophosphors were characterized by their excitation and emission spectra. The photoluminescent spectra exhibited a prominent blue emission band centered at 465 nm, corresponding to the 4T1-6A1 transition of Mn2+ under an excitation wavelength of 260 nm.


Entidades citadas de la UNAM: