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CdSe electrodeposition on anodic, barrier or porous Ti oxides. A sensitization effect

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National Technical University of Athens   

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CdSe electrodeposition on anodic, barrier or porous Ti oxides. A sensitization effect (EN)
Karoussos, D (EN)
Bouroushian, M (EN)
Kosanovic, T (EN)
journalArticle (EN)
2014-03-01T01:32:59Z
2010 (EN)
A variety of oxide layers, from passive amorphous TiOx of few nanometer thicknesses to micrometer-thick porous with different anatase to rutile ratios, were prepared by potentiostatic or galvanostatic anodization of Ti metal in H2SO4 and HF/H3PO4 solutions and used as substrates for electrodeposition of cadmium selenide from acidic selenite baths. The substrate and CdSe microstructures were investigated by X-ray diffraction and electron microscopy techniques. Barrier TiOx and heterogeneously structured oxide substrates induced growth of zinc blend/wurtzite CdSe, whereas highly ordered porous titanium dioxide (TiO2) accommodated growth of (10.0) oriented hexagonal CdSe thin layers. Pulsed potential plating was employed to control pore-filling during electrodeposition of CdSe. Photoelectrochemical evaluation of the produced electrodes in polysulfide cell under green light illumination implied a TiO2 sensitization effect in the case of CdSe/(porous TiO2)/Ti system, as evidenced by a negative shift in flat band potential and an increase in open circuit potential. The sensitization effect was observed even with CdSe deposited by a single potential pulse signifying the importance of contacting the TiO2 surface to the electrolytic solution via a very thin layer of CdSe. © 2009 Springer-Verlag. (EN)
Electrochemistry (EN)
Photoelectrochemistry (EN)
Cadmium alloys (EN)
Cadmium (EN)
Polysulfides (EN)
Anodization (EN)
Substrates (EN)
Zinc (EN)
Cadmium selenides (EN)
Cadmium compounds (EN)
Cadmium selenide (EN)
Thin films (EN)
Titanium oxides (EN)
Anodizations (EN)
X ray diffraction analysis (EN)
Photo-electrochemistry (EN)
Light (EN)
Oxide minerals (EN)
Electrochemistry (EN)
Titanium (EN)
Electrodeposition (EN)
Titanium dioxide (EN)
Optical sensitization (EN)
Journal of Solid State Electrochemistry (EN)
English
SPRINGER (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
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