Structural changes and self-activated photoluminescence in reductively annealed Sr3AlO4F

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dc.contributor.authorGreen, RLen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorVogt, Ten_AU
dc.date.accessioned2021-06-03T04:07:47Zen_AU
dc.date.available2021-06-03T04:07:47Zen_AU
dc.date.issued2015-08-01en_AU
dc.date.statistics2021-03-24en_AU
dc.description.abstractWhite light emission of self-activated photoluminescence (PL) in Sr3AlO4F under 254 nm light is only observed after annealing in a reducing atmosphere of 5%H2/95%Ar. High-resolution neutron powder diffraction reveals that the FSr6 octahedrons and AlO4 tetrahedrons in this anti-perovskite structure are closer packed in reduced than in air-annealed samples which show no PL. Careful analysis of temperature-dependent neutron powder diffraction data establishes smaller isotropic displacement parameters for Sr(1) and O in Sr3AlO4F annealed in a reducing atmosphere indicating that the denser packing of the polyhedral sub-units leads to a slightly deeper potential for the Sr(1) and O atoms. Both the air- and reductively-annealed samples have identical thermal expansion within the temperature range between 3 and 350 K. The Debye temperatures were calculated using the atomic displacement parameters and show no significant differences between the air and reductively annealed samples making the Debye temperature a bad proxy for self-activated PL. © 2015 Elsevier Inc.en_AU
dc.identifier.citationGreen, R., Avdeev, M., & Vogt, T. (2015). Structural changes and self-activated photoluminescence in reductively annealed Sr3AlO4F. Journal of Solid State Chemistry, 228, 1-8. doi:10.1016/j.jssc.2015.04.017en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination45139en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jssc.2015.04.017en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10812en_AU
dc.identifier.volume228en_AU
dc.language.isoenen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPhotoluminescenceen_AU
dc.subjectAtomic displacementsen_AU
dc.subjectAnnealingen_AU
dc.subjectThermal expansionen_AU
dc.subjectDebye temperatureen_AU
dc.titleStructural changes and self-activated photoluminescence in reductively annealed Sr3AlO4Fen_AU
dc.typeJournal Articleen_AU
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