Electrodeposited CuO thin film for wide linear range photoelectrochemical glucose sensing

Cory, Neville J.; Visser, Eran; Chamier, Jessica; Sackey, J.; Cummings, Franscious; Chowdhury, Mahabubur

doi:10.1016/j.apsusc.2021.151822

Cited by 26 publications

(2 citation statements)

References 57 publications

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“…There are consequently 12 modes of zone-centered optical phonons, 4A u + 5B u + A g + 2B g . They can be classified into various modes such as: three acoustic modes (A u + 2B u ), six active infrared modes (3A u + 3B g ) and three active Raman modes (A u + 2B g ) in the central zone (B. P. Kliche & Popovic, 1990;Cory et al, 2022). It is known that, because of the symmetry of the site, only the displacements of the oxygen atom can cause the Raman modes.…”

Section: Raman Spectroscopy Analysismentioning

confidence: 99%

Unravelling the role of nickel doping on the physical properties of CuO thin films deposited by Spray Pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

Daoudi

Jellal

Haddout

et al. 2022

Preprint

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Whereas solar photovoltaic cells are promising for proper power production,their wide deployment is hampered by production costs, material availability and toxicity. One of these materials is CuO, which has great chemical stability as well as interesting physical properties, including a direct band gap, a high absorption coef cient, and p-type conductivity. These properties indicate CuO as an exciting semiconducting material to use an absorber layer in thin lms solar cells. For this speci c reason, this paper focuses on the synthesis of undoped and Ni-doped CuO thin lms by spray pyroly- sis process. Several techniques such as; X-ray diffraction (XRD), Raman spectroscopy, Scanning Electron Microscopy (SEM), Energy dispersive X-ray (EDX) and UV-Visible spectroscopy have been employed to characterize the synthesized samples. The XRD analysis indicated the formation of polycrystalline CuO thin lms and the average crystallite size was decreased from 35 to 20 nm for the samples with x = 0 to 8 at%, respectively. Furthermore, Raman spectroscopy also con rms the single-phase formation of CuO lms. The SEM images demonstrated that the incorporation of Ni in the CuO matrix improved the lms surface. The EDX analysis and the elemental mapping belay the homogeneous distribution of the elements. Moreover, UV-Visible spectroscopy has shown a signi cant expansion in optical energy band gap from 1.45 to 1.53 eV with an increase of Ni concentration. On the other hand, to investigate the impact of Ni-doped CuO on nanos- tructure Ni:CuO/ ZnO-NRs heterojunction solar cell performance, SCAPS-1D software is used. It has been found that, 8% Ni:CuO layer has been revealed as better for nanostructured solar cells. The results of this contribution will provide some vital guidelines for fabricating higher-ef ciency solar cells.

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Section: Raman Spectroscopy Analysismentioning

confidence: 99%

Unravelling the role of nickel doping on the physical properties of CuO thin films deposited by Spray Pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

Daoudi

Jellal

Haddout

et al. 2022

Preprint

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“…P-type CuO material, with high catalytic activity and great sunlight absorption capacity, is cheap, environmentally friendly, and rich in natural resources. Due to the above excellent chemical and physical properties, increasing numbers of developments and applications for the CuO material, such as CO 2 photocatalytic reduction [20], photoelectrochemical water splitting [21], photocatalytic reduction of Cr(VI) [22], fast adsorption of noxious Cr(VI) ions from the solvent phase [23], and glucose monitoring [24], have been developed. As a material with good light absorption and excellent photoelectric activity, CuO has rarely been used for PEC sensing of Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Unbiased and Signal-Weakening Photoelectrochemical Hexavalent Chromium Sensing via a CuO Film Photocathode

et al. 2023

Nanomaterials

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Photoelectrochemical (PEC) sensors show great potential for the detection of heavy metal ions because of their low background noise, high sensitivity, and ease of integration. However, the detection limit is relatively high for hexavalent chromium (Cr(VI)) monitoring in addition to the requirement of an external bias. Herein, a CuO film is readily synthesized as the photoactive material via reactive sputtering and thermal annealing in the construction of a PEC sensing photocathode for Cr(VI) monitoring. A different mechanism (i.e., Signal-Weakening PEC sensing) is confirmed by examining the electrochemical impedance and photocurrent response of different CuO film photoelectrodes prepared with the same conditions in contact with various solutions containing concentration-varying Cr(VI) for different durations. The detection of Cr(VI) is successfully achieved with the Signal-Weakening PEC response; a drop of photocathode signal with an increasing Cr(VI) concentration from the steric hindrance effect of the in situ formed Cr(OH)3 precipitates. The photocurrent of the optimized CuO film photocathode linearly declines as the concentration of Cr(VI) increases from 0.08 to 20 µM, with a detection limit down to 2.8 nM (Signal/Noise = 3) and a fitted sensitivity of 4.22 µA·μM−1. Moreover, this proposed sensing route shows operation simplicity, satisfactory selectivity, and reproducibility.

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Unravelling the role of nickel incorporation on the physical properties of CuO thin films deposited by spray pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

Daoudi

Jellal

Haddout

et al. 2023

J Mater Sci: Mater Electron

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Electrodeposited CuO thin film for wide linear range photoelectrochemical glucose sensing

Cited by 26 publications

References 57 publications

Unravelling the role of nickel doping on the physical properties of CuO thin films deposited by Spray Pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

Unravelling the role of nickel doping on the physical properties of CuO thin films deposited by Spray Pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

Unbiased and Signal-Weakening Photoelectrochemical Hexavalent Chromium Sensing via a CuO Film Photocathode

Unravelling the role of nickel incorporation on the physical properties of CuO thin films deposited by spray pyrolysis and theoretical analysis of nanostructured ZnO/Ni:CuO-based heterojunction solar cells

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