Voltammetry of chemically deposited Cu x O electrochromic films, coated with ZnO or TiO2 electrocatalyst layers

Neshkovska, Ratka (2014) Voltammetry of chemically deposited Cu x O electrochromic films, coated with ZnO or TiO2 electrocatalyst layers. Journal of Solid State Electrochemistry, 19.

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CuxO is a known electrochromic material for solar
light modulation applications. CuxO films were synthesized
by chemical bath deposition (CBD) method from two aqueous
solutions. The films contained the two oxide phases of copper,
CuO and Cu2O, established from the X-ray photoelectron
spectroscopy (XPS) analysis. The scanning electron microscopy (SEM) scans of the CuxO film surface demonstrated that
the films grew in round grains with average diameters of about
260, 470, and 620 nm, for the films grown upon 100,150, and
200 successive immersions, correspondingly. Cyclic voltammetry has been employed as a tool for examination of the
reversible red-ox kinetics. It appeared that the grain size is an
influential factor for the voltammetric parameter’s enhancement as the most distinct redox peaks were observed at the
470-nm grain size CuxO film. In order to enhance the
electrochromic performance of the CuxO-based electrochromic
device, two wide gap semiconductors (ZnO and TiO2) were
coated onto CuxO, assuming they reveal protection/catalyst
character. Although the “morphology” of the voltammetric
profile was found to be similar for the as-prepared and
the coated CuxO films, the voltammetric intensity response
apparently grew for the coated films. Furthermore, the results
showed that the examined coatings catalyzed the electrochemical redox process, thereby boosting up the efficiency of the
CuO↔Cu2O reversible electrochemical conversion.

Item Type: Article
Uncontrolled Keywords: Chemical deposition . Electrochromism . XPS . SEM . CuxO . ZnO . TiO2 . Cyclic voltammetry
Subjects: Scientific Fields (Frascati) > Natural sciences > Physical sciences
Divisions: Faculty of Technical Sciences
Depositing User: PhD Ratka Neshkovska
Date Deposited: 07 Sep 2023 08:06
Last Modified: 07 Sep 2023 08:06
URI: https://eprints.uklo.edu.mk/id/eprint/8827

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