Report
Modification of the spectroscopic properties of Tb2O3 phosphor under the high-pressure phase transitions sequence
| العنوان: | Modification of the spectroscopic properties of Tb2O3 phosphor under the high-pressure phase transitions sequence |
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| المؤلفون: | Candela, Marina T., Aguado, Fernando, González-Lavín, Judith, González, Jesús A., Valiente, Rafael |
| بيانات النشر: | Zenodo |
| سنة النشر: | 2020 |
| المجموعة: | Zenodo |
| مصطلحات موضوعية: | Phosphors, High-Pressure, Phase transitions, Luminescence, Inelastic Light Scattering |
| الوصف: | The high-pressure behavior of cubic Tb2O3 phase (C-type) has been investigated by in situ photoluminescence and Raman spectroscopy up to 18 GPa and 22 GPa, respectively. The luminescence spectrum of Tb2O3 at ambient conditions shows its characteristic sharp-line emission bands with the most intense one corresponding to the 5D4 - 7F5 transition, responsible of the green emission. Excitation and emission spectra measured at low temperature and at different emission and excitation wavelengths suggest that photoluminescence is governed by the Tb3+ in the non-centrosymmetric site (C2). A phase transition between 7.2 and 8.6 GPa is observed by Raman and photoluminescence experiments and is associated to a cubic-to-monoclinic (B-type) structural transformation. From 14 GPa the predominant modes in the Raman spectrum correspond to those from the trigonal phase (A-type), indicating that the pressure-induced structural phase transition sequence of Tb2O3 is C → B → A. Upon pressure release, the starting cubic phase is not recovered, but the monoclinic one. |
| نوع الوثيقة: | report |
| اللغة: | English |
| Relation: | https://doi.org/10.5281/zenodo.10582178; https://doi.org/10.5281/zenodo.10582179; oai:zenodo.org:10582179; https://doi.org/10.1016/j.jallcom.2020.157899; https://www.sciencedirect.com/science/article/abs/pii/S0925838820342638 |
| DOI: | 10.5281/zenodo.10582179 |
| DOI: | 10.1016/j.jallcom.2020.157899 |
| الاتاحة: | https://doi.org/10.5281/zenodo.10582179 https://doi.org/10.1016/j.jallcom.2020.157899 https://www.sciencedirect.com/science/article/abs/pii/S0925838820342638 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.A837D9F9 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5281/zenodo.10582179 |
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