Optical and electrical properties of p-type transparent conducting CuAlO2 thin film synthesized by reactive radio frequency magnetron sputtering technique

Saha, Biswajit; Thapa, Ranjit; Jana, Sourav Kanti; Chattopadhyay, Kalyan Kumar

doi:10.1007/s12648-010-0124-x

Cited by 20 publications

(5 citation statements)

References 25 publications

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“…Metal oxides have been studied extensively for improving their functionality and exploring their outstanding physical properties in low dimension [24][25][26]. In this study, highly crystalline α-Fe 2 O 3 nanoparticles were synthesized by a very simple chemical precipitation method and its applicability was studied for removal of a pollutant anionic dye of methyl orange (MO) from aqueous media.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Debnath

Deb

Chattopadhyay

et al. 2016

Desalination and Water Treatment

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A B S T R A C TNanoparticles of α-Fe 2 O 3 were synthesized by simple chemical precipitation method and characterized by X-ray diffraction study, scanning electron microscopy, and Fourier transform infrared spectroscopy. Feasibility of as-synthesized nanoparticles was investigated for adsorptive removal of methyl orange (MO) dye from aqueous solution. The effects of various experimental parameters such as solution pH, initial MO concentration, contact time, and α-Fe 2 O 3 nanoparticles dose were studied in batch mode. More than 90% removal was reported at pH 2.0 with 30 mg L −1 initial MO concentration treated with 1.00 g L −1 adsorbent dose. Isotherm study reveals that Langmuir isotherm model is the most efficient one in explaining the process and maximum adsorption capacity as much as 28.90 mg g −1 is reported. Kinetic study shows that the adsorption process is best explained by second-order kinetic model confirming the dominancy of chemisorption in the process. Subsequently, the experimental data were modeled by artificial neural network to predict the removal efficiency of MO by α-Fe 2 O 3 nanoparticles following conduction of 95 experimental data points. A three-layer feed-forward back-propagation model with Levenberg-Marquardt algorithm was developed which show that the optimal network topology is 4-10-1. Model predicted data shows very good agreement with experimental data set with mean squared error and coefficient of determination (R 2 ) as 0.00152 and 0.9916, respectively.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Debnath

Deb

Chattopadhyay

et al. 2016

Desalination and Water Treatment

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“…The related studies of delafossite TCO S presented the p-type conductivity characteristics, which highlighted the achievements and developments. [28][29][30] As discussed, the point defects are essential for the electrical mechanisms of CuFeO 2 . The nonstoichiometric defect formations contribute to the generation of hole carriers such as Cu, Fe vacancies, or excess oxygen, or both in the CuFeO 2 film.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Optoelectronic Properties of CuFeO₂Semiconductor Thin Films

Lee

Lai

2016

ECS J. Solid State Sci. Technol.

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This paper explored the influence of structural transformations on the optical and electrical properties of the p-type semiconductor CuFeO2 thin film. In the Cu-Fe-O phase change process, monoclinic CuO and spinel CuFe2O4 are low-temperature phase structures. With the increase in temperature, the copper, iron, and oxygen atoms had higher energy, sufficient to be stacked and arranged as delafossite, CuFeO2, where CuFeO2 is a high-temperature stable phase. As the annealing temperature increased from 600°C to 850°C, a cell-like microstructure grew on the surface of the CuFeO2, the surface root mean square roughness gradually increased from 3.10 nm to 10.40 nm. The structural transformation dominantly affected the absorption coefficient of the Cu-Fe-O thin film. The CuFeO2 thin film mainly absorbs photons with wavelengths less than 400 nm. Photon energies of high effective excitation were identified, with values ranging over 3.63–3.87 eV. The CuFeO2 film annealed at 700°C had better electrical properties; the bandgap, Hall coefficient, and electrical resistivity of the film were 3.16 eV, 139.2 cm3/C, and 1.19 Ωcm, respectively. The nano-scale structure and characteristics of CuFeO2 were analyzed. Furthermore, this study also compared the microstructure and optoelectronic properties of CuFeO2, CuAlO2, and CuCrO2.

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“…In each case, doped "boundary" layers can find applications. In case the exact formation of CuAlO 2 , AgAlO 2 and ZnAl 2 O 4 compounds is proved, the electrochemical synthesis of their thin layers for other promising applications actively under consideration, such as transparent conductive films [115][116][117][118][119][120][121][122][123], may be of interest for photoelectronic [124] and mechanical applications [125], optoelectronics [125], photo-thermoelectric and thermoelectric applications [126,127], fluorescence materials [128], sensors [125,[129][130][131], and electro-and photocatalysts [132][133][134][135][136].…”

Section: Possible Future Research and Applicationsmentioning

confidence: 99%

Porous and Ag-, Cu-, Zn-Doped Al2O3 Fabricated via Barrier Anodizing of Pure Al and Alloys

Poznyak,

Knörnschild,

Hoha

et al. 2024

Coatings

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The paper breaks the general concepts and shows that pore formation is possible in anodic aluminum barrier oxide by anodizing of pure Al, and also presents the results of electrochemical anodizing in boric acid and citrate buffer aqueous solutions of homogeneous binary alloys AlCu (4 wt.%), AlZn (3 wt.%) and AlAg (5.2 wt.% and 16.2 wt.%). Barrier anodizing allowed obtaining Al2O3 thin films doped with copper, zinc and silver. The anodizing behavior and the effect of anodic current density on the charge were studied, and scanning electron microscopy, X-ray photoelectron spectroscopy and Auger electron spectroscopy analyses were performed. The doped alumina thin films, which are a mixture of Al2O3, Cu2O, ZnO, Ag2O, AgO and promising double metal oxides CuAlO2, AgAlO2 and ZnAl2O4, are promising for use as resistive switching, photoelectron, mechanical, photo-thermoelectric and fluorescence materials; sensors; and transparent conductive and photocatalyst films.

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Optical and electrical properties of p-type transparent conducting CuAlO2 thin film synthesized by reactive radio frequency magnetron sputtering technique

Cited by 20 publications

References 25 publications

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Synthesis and Optoelectronic Properties of CuFeO₂Semiconductor Thin Films

Porous and Ag-, Cu-, Zn-Doped Al2O3 Fabricated via Barrier Anodizing of Pure Al and Alloys

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Optical and electrical properties of p-type transparent conducting CuAlO2 thin film synthesized by reactive radio frequency magnetron sputtering technique

Cited by 20 publications

References 25 publications

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3 nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Synthesis and Optoelectronic Properties of CuFeO2Semiconductor Thin Films

Porous and Ag-, Cu-, Zn-Doped Al2O3 Fabricated via Barrier Anodizing of Pure Al and Alloys

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Synthesis and Optoelectronic Properties of CuFeO₂Semiconductor Thin Films