Laser-Activated Luminescence of BaAl2O4:Eu

Please use this identifier to cite or link to this item: 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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