دورية أكاديمية
Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors
| العنوان: | Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors |
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| المؤلفون: | A. Luchechko, Y. Shpotyuk, O. Kravets, O. Zaremba, K. Szmuc, J. Cebulski, A. Ingram, R. Golovchak, O. Shpotyuk |
| المصدر: | Journal of Advanced Ceramics, Vol 9, Iss 4, Pp 432-443 (2020) |
| بيانات النشر: | Tsinghua University Press, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Clay industries. Ceramics. Glass |
| مصطلحات موضوعية: | spinel structure, magnesium gallate MgGa2O4, X-ray diffraction (XRD), positron annihilation, Mn2+ and Eu3+ luminescence, Clay industries. Ceramics. Glass, TP785-869 |
| الوصف: | Abstract Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysis. Morphology investigations with transmission electron microscopy (TEM) show irregularly shaped grains and grain boundaries with a homogeneous distribution of Eu3+ ions. The inability of Eu activator to penetrate the bulk of ceramic grains is inferred from positron annihilation lifetime spectroscopy data. The Eu doping is shown to enhance the positron trapping rate due to the occupancy of vacancy-type defects at ceramic grains by Eu3+ ions. Both Mn2+ and Eu3+ doped samples show a broad multi-color luminescence in 350–650 nm range under 240 nm and 270–300 nm excitations. Blue emission is concluded to originate from host defects, whereas green emission and narrow lines in the red region of the spectrum are attributed to Mn2+ and Eu3+ ions, respectively. High asymmetry around Eu3+ ions can be concluded from the photoluminescence and positron annihilation lifetime spectra analysis. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2226-4108 2227-8508 |
| Relation: | https://doaj.org/toc/2226-4108; https://doaj.org/toc/2227-8508 |
| DOI: | 10.1007/s40145-020-0386-5 |
| URL الوصول: | https://doaj.org/article/547bdb7a9c944e7ab7c1436a5d7c580f |
| رقم الأكسشن: | edsdoj.547bdb7a9c944e7ab7c1436a5d7c580f |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 22264108 22278508 |
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| DOI: | 10.1007/s40145-020-0386-5 |