Crystal defects and optical emissions of pulse electrodeposited ZnO

Manzano, Cristina V.; Serrano, Aída; Muñoz-Noval, Á.; Fernández, J.F.; Martín‐González, Marisol

doi:10.1016/j.electacta.2020.136662

Cited by 9 publications

(2 citation statements)

References 29 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By photoluminescence measurements is possible to analyze the band gap of ZnO nanowires and the defects of the material 164,165 . ZnO nanowire arrays grown on ITO substrate exhibits a band gap of 3.27 eV and a wide emission band in the yellow-orange region due to interstitial oxygen 5 .…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Recent progress in the electrochemical deposition of ZnO nanowires: synthesis approaches and applications

Manzano

Philippe

Serrà

2021

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

Recent progress in the electrochemical deposition of ZnO nanowires: Synthesis approaches and applicationsIn the last decade, nanostructuration is a demanding research topic due to the observation of interesting properties and, in consequence, applications on these nanostructures. This review collects the synthesis and possible applications of ZnO nanowires grown by electrodeposition and electroless methods. Respect to the synthesis of ZnO nanowires, growth mechanism and parameters are analysed depending on the technique used, electrodeposition or electroless. The mechanism growth of the nanowires using templateless and hard-templates is analysed resulting in different architecture of the ZnO nanowires. Moreover, ZnO nanowires and hybrid materials based on ZnO are also considered. Depending on the architecture of ZnO nanowires, the properties and applications are different.This review also studies the properties and applications in which ZnO nanowires can be used and how these applications are different depending on the architecture of the nanostructure. This review gives a complete perspective referent to the synthesis, properties and application of ZnO nanowires grown by electrosynthesis techniques.

show abstract

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Recent progress in the electrochemical deposition of ZnO nanowires: synthesis approaches and applications

Manzano

Philippe

Serrà

2021

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

show abstract

“…It exhibits outstanding chemical stability, favoring photo-corrosion resistance, at a very low cost. These properties make ZnO a perfect candidate for its industrial use in photocatalysts [2], ultraviolet (UV) detectors [3], lightemitting diodes [4], and dye-sensitized solar cells (DSSCs) [5]. Careful control of wurtzite surface area, distribution, and orientation, allows conduction control for electron-hole pairs, and excellent transmittance in the visible spectral region.…”

Section: Introductionmentioning

confidence: 99%

ZnO Electrodeposition Model for Morphology Control

Orozco-Messana

Camaratta

2022

Nanomaterials

View full text Add to dashboard Cite

In this research, a model for electrodeposition of zinc oxide (ZnO) nanostructures over indium-doped tin-oxide (ITO) glass using pulsed current and zinc chloride as source of zinc was proposed. For the model, reactions kinetics rate constants were evaluated by obtaining the reaction product solid mass of the various species through time using an electrochemical quartz crystal microbalance (EQCM). To obtain a mathematical model of the electrodeposition using Ansys CFX 2D simulation software, the reaction kinetics rates were used to calculate mass transfer in the volume closest to the surface. The model was applied to the experimental electrodeposition conditions to validate its accuracy. Dense wurtzite nanostructures with controlled morphology were obtained on a indium-doped tin-oxide (ITO) glass. Sample characterization was performed using high-resolution field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) on focused ion beam milled (FIBed) sheets from wurtzite mono-crystals. Average crystallite size was evaluated by X-ray diffraction (XRD) using the Scherrer equation, and superficial areas were evaluated by Brunauer, Emmett, and Teller (BET) method. Through the experimental results, a chemical model was developed for the competing reactions based on the speciation of zinc considering pH evolution, and kinetic constants, on the oxygen rich aqueous environment. Owing to the model, an accurate prediction of thickness and type of electrodeposited layers, under given conditions, is achieved. This allows an excellent control of the optical properties of Wurtzite as a photon absorber, for an efficient separation of the electron-hole pair for conduction of the electric charges formed. The large surface area, and small wurtzite crystallites evenly distributed on the thin film electrodeposited over the ITO conductive layer are promising features for later dye-sensitized photovoltaic cell production.

show abstract

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

Fuller

Martin

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

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.

show abstract

Crystal defects and optical emissions of pulse electrodeposited ZnO

Cited by 9 publications

References 29 publications

Recent progress in the electrochemical deposition of ZnO nanowires: synthesis approaches and applications

Recent progress in the electrochemical deposition of ZnO nanowires: synthesis approaches and applications

ZnO Electrodeposition Model for Morphology Control

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

Contact Info

Product

Resources

About