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http://bura.brunel.ac.uk/handle/2438/20121
Title: | Laser-Activated Luminescence of BaAl2O4:Eu |
Authors: | den Engelsen, D Fern, GR Ireland, TG Silver, J |
Issue Date: | 21-Jan-2020 |
Publisher: | IOP Publishing on behalf of The Electrochemical Society |
Citation: | den Engelsen, D., Fern, G.R., Ireland, T.G. and Silver, J. (2020) 'Laser-Activated Luminescence of BaAl2O4:Eu', ECS Journal of Solid State Science and Technology, 9 (2), 026001, pp. 1-6. doi: 10.1149/2162-8777/ab682c. |
Abstract: | Copyright © 2020 The Author(s). In this article the laser-activated (LA) luminescence of BaAl2O4 doped with 3 mol% Eu2+ and SrAl2O4 doped with 700 ppm Eu2+ is described. The LA spectrum of BaAl2O4:Eu did not show any emission from Eu2+, but rather luminescence from the Eu3+ ion. This surprising result is explained in terms of ionization of the excited Eu2+ ions (photo-ionization), while the freed electrons are trapped in an excited state of the F-centre: this is considered to be a deep trap. The temperature of the ferroelectric-paraelectric phase transition in BaAl2O4 has been determined at ≈180 °C from the Raman spectra recorded at various temperatures. |
URI: | https://bura.brunel.ac.uk/handle/2438/20121 |
DOI: | https://doi.org/10.1149/2162-8777/ab682c |
ISSN: | 2162-8769 |
Other Identifiers: | 026001 |
Appears in Collections: | Wolfson Centre for Sustainable Materials Development and Processing Dept of Mechanical and Aerospace Engineering Research Papers |
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FullText.pdf | Copyright © 2020 The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. | 1.04 MB | Adobe PDF | View/Open |
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