Eu-DOPED La1-xYxAlO₃: IMPACT Of Y/La RATIO ON OPTICAL PROPERTIES
YAlO₃ and LaAlO₃ are both important oxides used as matrices in optical applications. Their mutual solid solubility is kinetically dependent, especially in a polycrystalline form. In this work, we prepared La1-xYxAlO₃ (x = 0-0.65) samples doped with 5 at% of Eu3+ in the A-site. The samples were prepa...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Chemistry and Technology, Prague
2022-01-01
|
| Series: | Ceramics-Silikáty |
| Subjects: | |
| Online Access: |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1459
|
| Summary: | YAlO₃ and LaAlO₃ are both important oxides used as matrices in optical applications. Their mutual solid solubility is kinetically dependent, especially in a polycrystalline form. In this work, we prepared La1-xYxAlO₃ (x = 0-0.65) samples doped with 5 at% of Eu3+ in the A-site. The samples were prepared by Spark Plasma Sintering from powders synthetised by a reverse co-precipitation method. The single-phase samples were obtained up to a composition of La0.7Y0.25Eu0.05AlO₃; with a higher yttrium doping level, a mixture of Y-rich and La-rich perovskite-type phases was present. The La/Y substitution had an influence on a shift in the top of the valence band which influenced the excitation spectra. In photoluminescence and radioluminescence measurements, the Eu3+ local site symmetry changes were manifested by the change in intensity and fine splitting of the ⁵D0⟶⁷FJ (J = 1, 2, 3, 4, 5) emission bands. The increasing content of Y3+ caused a slight acceleration of the PL decay of the Eu3+ photoluminescence and an increase in the integral intensity of radioluminescence spectra. |
|---|---|
| ISSN: | 0862-5468 1804-5847 |