An electrochemical deposition route for obtaining α- Fe 2O3 thin films: II. EQCM study and semiconductor properties

Ricardo Schrebler, Cynthia Llewelyn, Francisca Vera, Paula Cury, Eduardo Muñoz, Rodrigo Del Río, Humberto Gómez Meier, Ricardo Córdova, Enrique A. Dalchiele

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

48 Citas (Scopus)

Resumen

The electrochemical formation of hematite (α- Fe2 O3) precursor thin films (oxyhydroxide iron compounds), onto gold substrates in an aqueous solution of Fe(III)+KF+ H2 O2 was investigated in situ using an electrochemical quartz crystal microbalance (EQCM) and voltammetric techniques. Nanostructured α- Fe2 O3 obtained after annealing of oxyhydroxide iron compounds thin films have been prepared onto SnO2 F covered glass substrates through a potential cycling procedure in this electrolytic bath. Photoelectrochemical measurements, carried out in 0.1 M NaOH+0.05 M KI electrolyte at pH 13, show an n-type behavior, a flatband potential of -1.08 V vs saturated mercury/mercury sulfate reference electrode, and an apparent donor density of 1.26× 1019 cm-3 at 1 kHz.

Idioma originalInglés
Páginas (desde-hasta)D95-D99
PublicaciónElectrochemical and Solid-State Letters
Volumen10
N.º10
DOI
EstadoPublicada - 2007
Publicado de forma externa

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