Optical parameters of a novel competitive selective absorber for low temperature solar thermal applications

Farchado, Meryem; Rodríguez, J.; Vicente, Gema San; Germán, Nuria; Morales, Ángel

doi:10.1016/j.solmat.2018.01.031

Cited by 20 publications

(11 citation statements)

References 17 publications

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“…The sol‐gel method may offer such technology replacement was considered as one promising method that may meet these requirements because it is an economical solution method that requires in total a considerably lower investment than the PVD method. As far as the required physical parameters, recent development begins to rise hope in that regard . Here, a multilayer structure was developed consisting of CuMnO x thin film and two antireflective coatings based on FeMnCuO x and SiO 2.…”

Section: Discussionmentioning

confidence: 99%

“…As far as the required physical parameters, recent development begins to rise hope in that regard. 5 Here, a multilayer structure was developed consisting of CuMnO x thin film and two antireflective coatings based on FeMnCuO x and SiO 2. In an attempt to simplify the coating technology, we investigated the benefits of introducing nanotechnology like CuO@SiO 2 light microtraps or scattering centers into well-established CuCoMnO x spinel coatings onto aluminum substrates.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, absorber coatings have also been prepared via the sol‐gel process, based on, for example, CoCuMnOx spinels with SiO x over‐coatings unveiled values of α s = 0.85‐0.91 and ε T below 0.036 ( α / ε = 17‐18) after a single dipping and annealing cycle attempting but still not achieving usable a s . Recently, a multilayered structure composed of a CuMnO x thin film and two antireflective coatings based on FeMnCuO x and SiO 2 were deposited via sol‐gel processing . This way, a s was improved to 0.957 and ε Τ to 0.038 at 100°C ( α / ε = 25) making this technology very promising.…”

Section: Introductionmentioning

confidence: 99%

“…4 Recently, a multilayered structure composed of a CuMnO x thin film and two antireflective coatings based on FeMnCuO x and SiO 2 were deposited via sol-gel processing. 5 This way, a s was improved to 0.957 and ε Τ to 0.038 at 100°C (α/ε = 25) making this technology very promising. Electrochemical treatment of metallic surfaces affects drastically the α sol and ε T values of the metal substrate.…”

Section: Introductionmentioning

confidence: 99%

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Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance

Κορδάς

2019

J Am Ceram Soc

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CuCoMnOx spinels were fabricated onto aluminum substrates via sol‐gel processing. The aluminum substrates were anodized to produce rough substrate surface, so to achieve diffuse reflection of incoming light. First, hollow copper nanospheres CuO particles have been produced with a size of 715 ± 15 nm. The copper oxide nanospheres were coated with SiO2 yielding to a total diameter of 980 ± 30 nm comparable to the wavelength of FIR light. The resulting materials were characterized structurally and morphologically. The coatings were assessed with respect to absorptance αsol and emittance εT behavior, determining the α/ε ratio. In case of CuO@SiO2 microspheres incorporation into CuCoMnOx spinel coatings, the α/ε ratio reached the value α/ε of 30. The light trapping/scattering effect of CuO@SiO2 microspheres incorporation was demonstrated by the variation of the concentration up to 1 wt% and determination of α/ε ratio. Based on these measurements, the α/ε ratio increases linearly with increasing CuO@SiO2 microspheres concentration.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance

Κορδάς

2019

J Am Ceram Soc

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“…This current interest is reflected in our previous published work in which a multi-layered absorber for low-temperature thermal applications based on CuMnO x and two antireflective coatings deposited by the dip-coating method on an etched aluminium substrate (Al-CuMnO x /CuFeMnO x /SiO 2 ) was reported [ 16 ]. The good spectral selectivity achieved, with solar absorptance of 0.957 and thermal emittance at 100 °C of 0.038, demonstrated the possibility of this three-layer configuration selective absorber to be considered as a future competitive material by the industry.…”

Section: Introductionmentioning

confidence: 99%

A Highly Stable and Sustainable Low-Temperature Selective Absorber: Structural and Ageing Characterisation

et al. 2022

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Solar absorbers in a three-layer configuration have been prepared by dip-coating onto aluminium substrates. They are constituted by two spinel layers with one silica layer on the top and values of solar absorptance above 0.950 and thermal emittance below 0.04 were obtained. The effects of using different sintering conditions of the upper silica layer on the optical behaviour and durability tests have been studied. Results obtained in accelerated ageing methods, such as thermal stability tests and condensation tests, clearly show that the proposed selective absorber exhibits excellent thermal stability and very good humidity resistance. The results show that the protective action is due not only to the silica layer but also to the alumina layer produced during the absorber preparation. The phase composition of the individual layers was independently confirmed using X-ray diffraction and corroborated by X-ray Photoelectron Spectroscopy. Spinel-like phases were obtained in both the first and second layers. The ageing study shows that the three-layer configuration proposed has a very high potential, in terms of both durability and optical behaviour, for solar thermal low-temperature applications.

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Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Wang,

Qin,

Duan

et al. 2024

Adv Funct Materials

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The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior of electromagnetic waves, providing sufficient possibility for the realization of metamaterial absorbers with outstanding performance. However, metamaterial absorbers composed of metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, and expensive preparation costs. The selection of dielectric materials provides excellent alternatives due to their remarkable properties, thus dielectric‐based metamaterial absorbers (DBMAs) have attracted much attention. To promote breakthroughs in DBMAs and guide their future development, this work systematically and deeply reviews the recent research progress of DBMAs from four different but progressive aspects, including physical principles; classifications, material selections and tunable properties; preparation technologies; and functional applications. Five different types of theories and related physical mechanisms, such as Mie resonance, guided‐mode resonance, and Anapole resonance, are briefly outlined to explain DBMAs having near‐perfect absorption performance. Mainstream material selections, structure designs, and different types of tunable DBMAs are highlighted. Several widely utilized preparation methods for customizing DBMAs are given. Various practical applications of DBMAs in sensing, stealth technology, solar energy absorption, and electromagnetic interference suppression are reviewed. Finally, some key challenges and feasible solutions for DBMAs’ future development are provided.

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Optical parameters of a novel competitive selective absorber for low temperature solar thermal applications

Cited by 20 publications

References 17 publications

Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance

Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance

A Highly Stable and Sustainable Low-Temperature Selective Absorber: Structural and Ageing Characterisation

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

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Optical parameters of a novel competitive selective absorber for low temperature solar thermal applications

Cited by 20 publications

References 17 publications

Incorporation of spherical shaped CuO@SiO2 light microtraps into CuCoMnOx spinels to enhance solar absorbance

Incorporation of spherical shaped CuO@SiO2 light microtraps into CuCoMnOx spinels to enhance solar absorbance

A Highly Stable and Sustainable Low-Temperature Selective Absorber: Structural and Ageing Characterisation

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Contact Info

Product

Resources

About

Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance

Incorporation of spherical shaped CuO@SiO₂ light microtraps into CuCoMnO_x spinels to enhance solar absorbance