Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/95
Title: Luminescence properties of oxide films formed by anodization of aluminum in 12-tungstophosphoric acid
Authors: Stojadinović, Stevan 
Vasilić, Rastko 
Petković-Benazzouz, Marija 
Nedic, Z.
Kasalica, Bećko 
Belča, Ivan 
Zeković, Ljubiša 
Keywords: 12-Tungstophosphoric acid;Barrier oxide films;Galvanoluminescence;PEO;Photoluminescence
Issue Date: 30-Apr-2010
Journal: Electrochimica Acta
Abstract: 
In this paper, we have investigated luminescence properties of oxide films formed by anodization of aluminum in 12-tungstophosphoric acid. For the first time we have measured weak luminescence during anodization of aluminum in this electrolyte (so-called galvanoluminescence GL) and showed that there are wide GL bands in the visible region of the spectrum and observed two dominant spectral peaks. The first one is at about 425 nm, and the second one shifts with anodization voltage. As the anodization voltage approaches the breakdown voltage, a large number of sparks appear superimposed on the anodic GL. Several intensive band peaks were observed under breakdown caused by electron transitions in W, P, Al, O, H atoms. Furthermore, photoluminescence (PL) of anodic oxide films and anodic-spark formed oxide coatings were performed. In both cases wide PL bands in the range from 320 nm to 600 nm were observed. © 2010 Elsevier Ltd. All rights reserved.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/95
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2010.02.011
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