Thickness dependent morphological, structural and optical properties of SS/CuO nanocoatings as selective solar absorber

Welegergs, G. G.; Gebretnisae, H.G.; Tsegay, M.G.; Nuru, Z.Y.; Dube, Simiso; Mâaza, M.

doi:10.1016/j.infrared.2020.103619

Cited by 31 publications

(3 citation statements)

References 58 publications

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“…Figure 4(a-d) shows the XRD patterns of CuO nanocoatings spin coated on SS substrates at RS of 700, 800, 900, and 1000 rpm. of the peak at the diffracting angle θ by determining the width of (111) Bragg re ection (Gunalan et al 2012), and are found respectively to be 76, 57, 44, and 36 nm at RS of 700, 800, 900, and 1000 rpm, the results coincide with the trend observed by SEM, and con rm that increasing in RS the thickness, particle size, and crystallite size of the deposited coatings are decreased (Peng et al 2020;Welegergs et al 2021).…”

Section: Structural Propertiessupporting

confidence: 78%

“…It is well known that at lower RS of the spin coater, the coatings tended to be slightly thicker with rough surfaces (Mellbring et al 2001) (also observed from AFM and RBS), this leads to increase in solar absorption due to an intrinsic and interference-induced absorption of CuO in solar spectrum. In the IR region it causes to have high infrared absorption as well as higher attenuation of light, consequently the surface re ection of the coatings is lowering which results to rise the emissivity (ε) of the coatings (Dan and Basu 2020;Akoba et al 2021; Welegergs et al 2021). Moreover, the appropriate surface roughness can determine the optical property of absorber surfaces.…”

Section: Optical Propertiesmentioning

confidence: 99%

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Green synthesis of single layered SS/CuO nanocoatings as solar selective absorber: Morphological, Structural and optical properties

Welegergs

Gebretinsae

Tsegay

et al. 2022

Preprint

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Herein, spectrally selective single-layered CuO nanocoatings were successfully demonstrated via green synthesis, and deposited on stainless steel (SS) substrates using spin-coater at 700, 800, 900 and 1000 rpm. The morphological surface, structural, and compositional analysis of the obtained nanocoatings were studied using SEM, XRD, EDX, and Raman spectroscopy. The SEM images shows a nanorod-like structure surfaces with a dense surface morphology. The XRD patterns confirm the presence of peaks indexed to a monoclinic structural phase of CuO. The EDX spectra clearly reveals the presence of Cu, and O elements and XPS spectra reveals peaks of Cu2p and O1s core levels which are typical characteristics of Cu (II) and O(II), respectively in CuO. Raman spectra shows peaks at 305, 344, and 642 cm− 1 attributed to Raman active (Ag+2Bg) modes for Cu-O stretching. Rutherford backscattering spectrometry (RBS) determines content of the elements, and changes in thicknesses of the coatings with rotational speed (RS) of the spin coater. The elemental content of Cu, and O atoms are respectively 54, and 46 at %, and the thicknesses are calculated to be 1.406×1018 atoms/cm2 (296.3 nm), 1.286×1018 atoms/cm2 (271.0 nm), 1.138×1018 atoms/cm2 (239.8 nm), and 0.985×1015 atoms/cm2 (207.5 nm) at 700, 800, 900 and 1000 rpm, respectively. The optical properties of CuO nanocoatings was characterized using UV-Vis-NIR, and FTIR spectrometers, and its vital solar selectivity parameters of solar absorptance (α), and emissivity(ε) were evaluated in the range of 0.3–2.5, and 2.5–20µm wavelengths, respectively, and exhibits the solar parameters (α = 0.91, and ε = 0.31) associated to 700 rpm due to an intrinsic and interference-induced absorption as well as higher attenuation of light.

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Section: Structural Propertiessupporting

confidence: 78%

Section: Optical Propertiesmentioning

confidence: 99%

Green synthesis of single layered SS/CuO nanocoatings as solar selective absorber: Morphological, Structural and optical properties

Welegergs

Gebretinsae

Tsegay

et al. 2022

Preprint

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“…D. Kishore Kumar et al have shown [ 18 ] that the SILAR method provides phase purity of a tin selenide layer formed and used in solar cells. In addition, this method allows the thickness, morphology, and composition to be controlled, which is very important for the optical properties of a thin film [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of In-Incorporation and Annealing on CuxSe Thin Films

Ivanauskas

Ancutienė

2021

Materials

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A study of indium-incorporated copper selenide thin-film deposition on a glass substrate using the successive ionic adsorption and reaction method (SILAR) and the resulting properties is presented. The films were formed using these steps: selenization in the solution of diseleniumtetrathionate acid, treatment with copper(II/I) ions, incorporation of indium(III), and annealing in an inert nitrogen atmosphere. The elemental and phasal composition, as well as the morphological and optical properties of obtained films were determined. X-ray diffraction data showed a mixture of various compounds: Se, Cu0.87Se, In2Se3, and CuInSe2. The obtained films had a dendritic structure, agglomerated and not well-defined grains, and a film thickness of ~90 μm. The band gap values of copper selenide were 1.28–1.30 eV and increased after indium-incorporation and annealing. The optical properties of the formed films correspond to the optical properties of copper selenide and indium selenide semiconductors.

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Amplifying main physical characteristics of CuO films using ascorbic acid as the reducer and stabilizer agent

et al. 2021

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Thickness dependent morphological, structural and optical properties of SS/CuO nanocoatings as selective solar absorber

Cited by 31 publications

References 58 publications

Green synthesis of single layered SS/CuO nanocoatings as solar selective absorber: Morphological, Structural and optical properties

Green synthesis of single layered SS/CuO nanocoatings as solar selective absorber: Morphological, Structural and optical properties

Effect of In-Incorporation and Annealing on CuxSe Thin Films

Amplifying main physical characteristics of CuO films using ascorbic acid as the reducer and stabilizer agent

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