The photoelectrochemical behavior of anodic films on Al alloys, containing titanium, tantalum, and tungsten (valve metals), has been studied as a function of alloy composition and anodizing conditions. Photocurrent spectroscopy has been used to get information on bandgap and the flatband potential values of different mixed oxides. Both insulator-like and semiconducting behavior has been observed for anodic oxides grown on Al-W and Al-Ti alloys dependent on alloy initial composition. Optical bandgap values, Eg,opt, of different oxides are in accordance with predictions based on the correlation between Eg,opt and the difference of electronegativities of the oxide constituents, indicating potential for tailoring solid state properties of ternary oxides.
|Numero di pagine||9|
|Rivista||Journal of the Electrochemical Society|
|Stato di pubblicazione||Published - 2006|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry
Santamaria, M., Di Quarto, F., Thompson, Skeldon, Di Quarto, & Santamaria (2006). Effect of Composition on the Photoelectrochemical Behavior of Anodic Oxides on Binary Aluminum Alloys. Journal of the Electrochemical Society, 153, B518-B526.