ISSN:
1572-8838
Keywords:
electrodeposition
;
nucleation
;
optical transmission
;
oxygen reduction
;
tin oxide
;
zinc oxide
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract Zinc oxide was electrodeposited from oxygenated aqueous solutions of zinc chloride at 80 ∘C on tin oxide covered glass substrates. A new activation treatment for the substrate is established. This consists in the initial formation, in the deposition solution, of a thin metallic zinc layer (5–50 nm) converted to ZnO by in situ reoxidation. Variable densities of nucleation centers (with values approaching 1010 cm−2) are formed by this treatment. This allows control of the formation of a zinc oxide layer ranging from open deposits of isolated crystallites to compact and homogeneous layers. Compact layers have high specular transmission below the band gap value (∼3.5 eV), whereas open films exhibit extensive light scattering. The shapes of the current–time curves during deposition are discussed in terms of nucleation and structural effects. A possible influence of the semiconducting properties of the films is pointed out.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1003857026200
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