Photoluminescence and molecular orbital theory in anodic oxide films formed on aluminium

We use molecular orbital theory (MOT) to explain the existence of one or two excitation maxima in photoluminescence excitation spectra of Al 2O 3 formed on Al in different aqueous electrolytes (H 2SO 4, H 3PO 4, H 2CrO 4, Na 2CO 3, H 2C 2O 4 and HCOOH). All oxides were formed at the same temperature...

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Bibliographic Details
Published in:Electrochimica acta 1989-12, Vol.34 (12), p.1707-1709
Main Authors: Jovanic, B, Zekovic, L J, Urosevic, V, Radenkovic, B
Format: Article
Language:English
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Summary:We use molecular orbital theory (MOT) to explain the existence of one or two excitation maxima in photoluminescence excitation spectra of Al 2O 3 formed on Al in different aqueous electrolytes (H 2SO 4, H 3PO 4, H 2CrO 4, Na 2CO 3, H 2C 2O 4 and HCOOH). All oxides were formed at the same temperature and current density. Comparing experimental and calculated values of the maximum of the excitation wavelength λ max we concluded: (a) that structural change in the formed oxides occurred; (b) that differences in λ max are in connection with different types of incorporated anions or anion fragments.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(89)85052-2