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RESEARCH PRODUCT
A photoelectrochemical study on anodic tantalum oxide films
Salvatore PiazzaCarmelo SunseriF. Di QuartoC. Gentilesubject
PhotocurrentBand gapChemistryGeneral Chemical EngineeringInorganic chemistryOxideAnalytical chemistryGeneral ChemistryCathodic protectionAnodeCorrosionMetalchemistry.chemical_compoundvisual_artvisual_art.visual_art_mediumGeneral Materials SciencePolarization (electrochemistry)description
Both anodic and cathodic photocurrents have been detected on tantalum oxide films depending on polarization. The optical band gap, E g opt , has been derived for anodic films grown in different conditions as well as for native oxides. Cathodic photocurrents at hv<E g opt have been attributed to electron injection at the metal/oxide interface. A change in the sign of the photocurrent with the wavelength of the incident light has been observed near to the flat band potential. The latter has been estimated from the fitting of the photocurrent vs potential curves
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Corrosion Science |