Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/20019
Title: | Crystal structure, photoluminescence and cathodoluminescence of Ba1-xSrxAl2O4 doped with Eu2+ |
Authors: | Volhard, M Yu, L den Engelsen, D Fern, GR Ireland, TG Silver, J |
Issue Date: | 27-Jul-2020 |
Publisher: | Optical Society of America |
Citation: | Volhard, M., You, L., den Engelsen, D., Fern, G.R., Ireland, T.G. and Silver, J. (2020) 'Crystal structure, photoluminescence and cathodoluminescence of Ba1-xSrxAl2O4 doped with Eu2+', Optical Materials Express, 10 (8), 1951 - 1961. doi: 10.1364/OME.10.001951. |
Abstract: | Copyright © the author(s). Herein we describe the synthesis, crystal structures, photoluminescence (PL) and cathodoluminescence (CL) spectra of phosphors in the Sr0.97-xBaxEu0.03Al2O4 system between x = 0 and x = 0.97. The syntheses of these phosphors were carried out by solid state reactions at 1350°C in mixed gas (H2/N2). The molar fractions of the alkaline earth elements were varied in steps of 0.1. The Sr1-xBaxAl2O4 series manifested solid solutions of a monoclinic phase (at the Sr-rich side) and a hexagonal phase (at the Ba-rich side). At the Ba-rich side of Srx-1BaxAl2O4:Eu2+ we found evidence in the PL spectra that the hexagonal phase differed as the xBa fraction changed: it changed at room temperature from the ferroelectric P63 structure at xBa=1 to the paraelectric P6322 phase at xBa≈0.9 and at xBa≈0.8 it went back to P63. Unlike the PL spectra, the CL spectra of the hexagonal phase of Sr0.97-xBaxEu0.03Al2O4 at x ≥ 0.5 indicated only the paraelectric P6322 phase at room temperature. |
URI: | https://bura.brunel.ac.uk/handle/2438/20019 |
DOI: | https://doi.org/10.1364/OME.10.001951 |
Other Identifiers: | ORCID IDs:
Daniel den Engelsen https://orcid.org/0000-0003-2982-5025;
Terry G. Ireland https://orcid.org/0000-0001-6512-9540. #363430 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
FullText.pdf | 2.8 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License