Influence of pulse frequency on the morphology, structure and optical properties of ZnO films prepared by pulsed electrodeposition

Caballero‐Briones, F.; Barón-Miranda, Javier A.; Guarneros-Aguilar, Cesia; Calzadilla, O.; Sanz, Fausto

doi:10.1088/2053-1591/ab2554

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…In Figure 3c) is noticed that band gap values increase with deposition frequency from 1.83 to 1.88 eV. The difference with characteristic Cu 2 O band gap value (2.2 eV) could be due to the presence of defects [10].…”

Section: Resultsmentioning

confidence: 83%

“…Therefore, a graphene oxide (GO) layer is proposed in this work as a separator between n-type (ZnO) and p-type (Cu2O) semiconductors to avoid ion migration and to favor device stability. On the other hand, it has been demonstrated that pulsed electrodeposition of semiconductors films produces changes in nanostructuration, crystallinity, grain size and optical properties [10]. In this work, the GO deposition effect onto Cu2O films deposited in different frequencies on its structure and optical properties is studied, as a first step for a full device development.…”

Section: Introductionmentioning

confidence: 99%

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Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.

González-Moreno,

Tolentino-Hernández,

Espinosa-Faller

2024

J. Phys.: Conf. Ser.

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In this work, copper (I) oxide films were prepared by pulsed electrodeposition onto copper substrates. Graphene oxide was deposited on the Cu2O/Cu films by cathodic electrophoresis. The films were studied by X-ray diffraction, Raman spectroscopy, optical reflectance and atomic force microscopy. The bandgap of the Cu2O/Cu films is close to 1.8 eV due to the presence of defects and decreases to close to 1.1 eV with GO deposition due to the oxidation of Cu2O to CuO on the surface. When GO was deposited, a reduction in the mean height was observed, indicating coverage of the entire surface. A topographic transformation of the surface was also observed, consisting of an increase in grain size and homogenization of the grain shape after GO deposition, possibly due to phase transformation. This work is the first step to prepare fully wet deposited thin film ZnO/GO/Cu2O/Cu solar cells.

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Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.

González-Moreno,

Tolentino-Hernández,

Espinosa-Faller

2024

J. Phys.: Conf. Ser.

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“…The disappearance of Cd impurities from the samples deposited under pulsed mode may be explained by the controlled growth of CdS during the pulsed deposition, where the off‐time duration allows the relaxation and the rearrangement of deposited atoms, which creates a new nucleation cites. [ 34 ] Hence, the atomic composition of the layer can be altered and the layer uniformity improved. [ 35 ]…”

Section: Resultsmentioning

confidence: 99%

Elaboration and Characterization of CdS Nanostructures Using Pulse‐Assisted Electrodeposition: Effect of Time‐Off Duration

Lahmar,

Kara,

Hamza

et al. 2024

Physica Status Solidi (a)

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The presence of metallic cadmium in the electrodeposited cadmium sulfide (CdS) films is a persistent problem that leads to low photoactivity. Changing the deposition mode is a way to address this problem and thus increase the photoelectrochemical performance. Herein, the effect of the deposition mode on the composition of the CdS films prepared under the same deposition parameters is investigated for the first time. In addition, the influence of the time‐off duration on the properties of the electrodeposited thin films is studied. The results of the X‐Ray diffraction, UV–vis spectroscopy, atomic force microscopy, and photoelectrochemical characterizations reveal that the pulse‐deposited CdS films show enhanced microstructural, optical, and morphological properties as compared to that of the film deposited under direct mode. The CdS thin film deposited at time‐off duration of 0.5 s is composed of a pure CdS phase following a mixture of cubic and hexagonal lattice structure. This sample shows a smooth surface, high absorption in UV and visible light and an intense photoresponse of 90 μA under visible light.

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Control of Texture and Morphology of Zinc Films through Pulsed Methods from Additive‐Free Electrolytes

Fuller

Martin

et al. 2021

ChemistrySelect

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We investigate the electrodeposition of zinc on steel substrates using pulsed methods from additive-free electrolytes in an industrially scalable parallel plate flow cell. We demonstrate that variables such as peak current and duty cycle can be used to independently control the morphology and preferential texture of the crystalline structure, which is, in turn, desirable for a variety of applications. Specifically, we have observed a transition of the preferential (002) facets at low peak current density (or low duty cycle) to ( 101) preferring facets at higher peak current density (or high duty cycle) as determined by the analysis of texture coefficients. Further analysis using scanning electron microscopy reveals a transition from the conventional hexagonal-shaped particles of zinc to needle-shaped structures, accompanied by a change in average crystallite size from 33 to 19 nanometers, determined from X-ray diffraction studies. The variation in morphology is also correlated to crystallographic textures through the analysis of texture coefficients and an understanding of crystallization mechanisms occurring during deposition. Collectively, these results demonstrate that the morphology and crystalline orientation of zinc can be easily manipulated through tuning of the pulse parameters without the use of complex and expensive additives that have been traditionally used to achieve similar effects.

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Influence of pulse frequency on the morphology, structure and optical properties of ZnO films prepared by pulsed electrodeposition

Cited by 8 publications

References 33 publications

Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.

Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.

Elaboration and Characterization of CdS Nanostructures Using Pulse‐Assisted Electrodeposition: Effect of Time‐Off Duration

Control of Texture and Morphology of Zinc Films through Pulsed Methods from Additive‐Free Electrolytes

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Influence of pulse frequency on the morphology, structure and optical properties of ZnO films prepared by pulsed electrodeposition

Cited by 8 publications

References 33 publications

Optical, structural and morphology study of Cu2O/Cu and GO/Cu2O/Cu films prepared by pulsed electrodeposition and electrophoresis.

Optical, structural and morphology study of Cu2O/Cu and GO/Cu2O/Cu films prepared by pulsed electrodeposition and electrophoresis.

Elaboration and Characterization of CdS Nanostructures Using Pulse‐Assisted Electrodeposition: Effect of Time‐Off Duration

Control of Texture and Morphology of Zinc Films through Pulsed Methods from Additive‐Free Electrolytes

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Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.

Optical, structural and morphology study of Cu₂O/Cu and GO/Cu₂O/Cu films prepared by pulsed electrodeposition and electrophoresis.