Journal of physical chemistry. C, 2012-02, Vol.116 (7), p.4493-4499
2012
Details
- Autor(en) / Beteiligte
- Titel
- Green, Silica-Coated Monoclinic Y2O3:Tb3+ Nanophosphors: Flame Synthesis and Characterization
- Ist Teil von
- Journal of physical chemistry. C, 2012-02, Vol.116 (7), p.4493-4499
- Ort / Verlag
- Columbus, OH: American Chemical Society
- Erscheinungsjahr
- 2012
- Link zum Volltext
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- Silica-coated and uncoated, Tb-doped (1–5 at % Tb) Y2O3 green nanophosphors were made, for the first time, in a single step by flame aerosol technology with controlled crystal phase (cubic and monoclinic) and morphology. The nanophosphors were characterized by X-ray diffraction, N2 adsorption, high resolution electron microscopy, and photoluminescence spectroscopy. The monoclinic crystal structure of Y2O3:Tb3+ nanophosphors favors the electric dipole 5D4 → 7F5 transition driving their green phosphorescence. The phosphorescence of the SiO2-coated monoclinic Y2O3:Tb3+ nanophosphors is lower than the uncoated ones. Upon annealing these nanophosphors, they were transformed from monoclinic to cubic and their phosphorescence was reduced. This further indicates the superior performance of the monoclinic crystal phase for the electric dipole transitions of Tb3+ ions.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1932-7447eISSN: 1932-7455DOI: 10.1021/jp211722zTitel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_3568749
- Format
- –
- Schlagworte
- Condensed matter: electronic structure, electrical, magnetic, and optical properties, Condensed matter: structure, mechanical and thermal properties, Exact sciences and technology, Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties, Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals, Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation, Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures, Physics, Solid surfaces and solid-solid interfaces, Structure of solids and liquids, crystallography, Surfaces and interfaces, thin films and whiskers (structure and nonelectronic properties)