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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.
Other Identifiers: ORCID IDs: Daniel den Engelsen; Terry G. Ireland
Appears in Collections:Dept of Mechanical and Aerospace Engineering Research Papers

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