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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.
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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