Effect of the microstructure on concentration quenching in heavily doped Tb2O3-ZrO2 nanoparticles embedded in silica
| Autor: | Enrico Trave, Pietro Riello, Davide Cristofori, Riccardo Polloni, Paolo Mazzoldi, Stefania Bucella, Alvise Benedetti |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Nanocomposite EMISSION CHARACTERISTICS LUMINESCENCE PHOSPHORS TERBIUM General Physics and Astronomy Nanoparticle Mineralogy chemistry.chemical_element Phosphor Terbium Microstructure Chemical engineering chemistry Cubic zirconia Physical and Theoretical Chemistry Luminescence High-resolution transmission electron microscopy |
| Popis: | Tb 3+ -doped ZrO 2 samples were prepared both as pure compounds and as a nanocomposite made up of sub-5 nm crystalline nanoparticles developed in an amorphous silica matrix. The materials were characterized by using HRTEM, XRD and luminescence spectroscopy. The amount of terbium crystallized into the zirconia lattice was determined by the Rietveld method. A significant improvement of the life time was observed in the nanocomposite with respect to the pure lanthanide doped zirconia particles despite of the very high (about 20 mol%) rare earth concentration developed. |
| Databáze: | OpenAIRE |
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