Triboluminescence of trivalent rare earth ions inserted in polycrystalline zinc oxide
| Autor: | Véronique Wintgens, J.C. Ronfard-Haret, Pierre Valat, Jean Kossanyi |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Photoluminescence
Materials science Inorganic chemistry Biophysics Analytical chemistry chemistry.chemical_element General Chemistry Zinc Electroluminescence Condensed Matter Physics Biochemistry Atomic and Molecular Physics and Optics Spectral line Triboluminescence Ion chemistry Impurity Crystallite |
| Zdroj: | Journal of Luminescence. 91:71-77 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/s0022-2313(00)00204-0 |
| Popis: | The room temperature triboluminescence of Er3+, Eu3+, Ho3+, Sm3+ and Tm3+ ions in the 400–850 nm range was observed during the abrasion of sintered polycrystalline ZnO samples containing the rare earth (RE) sesquioxides. The triboluminescence spectra are compared with the electro- and photoluminescence spectra of the pellets of the same composition and sintered under the same conditions. The tribo- and electroluminescence spectra show only the sharp lines characteristic of transitions between the 4f levels of the RE3+ ions whereas the photoluminescence spectra show only the broad ZnO emission. It is concluded that the triboluminescence of the RE3+ ions is consecutive to a direct electrical excitation, consequence of a breakdown in the RE3+-rich intergranular material. |
| Databáze: | OpenAIRE |
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