Revealing the innermost nanostructure of sputtered NiCrOx solar absorber cermets

Gaouyat, Lucie; He, Zhanbing; Colomer, Jean-François; Lambin, Philippe; Mirabella, F.; Schryvers, D.; Deparis, Olivier

doi:10.1016/j.solmat.2013.10.009

Cited by 24 publications

(21 citation statements)

References 20 publications

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“…The incident light was scattered by the CrN nanocrystalline and the optical path was enlarged. In addition, the efficient absorption of solar radiation can be explained by the nanocomposite structure of the layer, especially in connection with the size of nanoparticles (with radius of about 5 nm) and the fact that they are embedded in a dielectric matrix [43]. A comprehensive explanation was given in which the solar absorption is related to light-matter interaction mechanisms, including photon-induced electronic transitions, and photon-induced collective electron oscillations in the nanoparticles [44].…”

Section: Tem Studymentioning

confidence: 99%

Effects of antireflection layers on the optical and thermal stability properties of a spectrally selective CrAlN–CrAlON based tandem absorber

Zou

Huang

Wang

et al. 2015

Solar Energy Materials and Solar Cells

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Section: Tem Studymentioning

confidence: 99%

Effects of antireflection layers on the optical and thermal stability properties of a spectrally selective CrAlN–CrAlON based tandem absorber

Zou

Huang

Wang

et al. 2015

Solar Energy Materials and Solar Cells

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“…Most of black solar absorber coatings are formed by cermets composed of metals such as Mo, Ni, Cu, Fe, Cr, Au or Pt embedded in ceramic matrixes of (a) metal oxides: Al 2 O 3 [1,11,14,[20][21][22][23], NiO [18,24], CrNiO x [14,25], Cu x O [19,[26][27][28][29] and SiO 2 [1], (b) oxynitrides: NbAlON [28], CrON [12], or (c) nitrides: NbAlN [28], Si 3 N [3], CrMoN [12].…”

Section: Solar Absorber Coatingsmentioning

confidence: 99%

“…The optimized coating exhibited a solar spectral selectivity higher than 23 (Table 1), depending on size distribution and concentration of Ag NPs embedded in alumina matrix. Cermets coatings with composition Ni-NiO, on Al substrate, having spectral selectivity from 13 [18] to 19.4 [24], and Ni-NiCrOx with S = 43.6 [25] are recognized as versatile materials, suitable for solar selective absorbers. The infiltration of metallic Ni particles in the dielectric NiO or NiCrO x matrix represents a prerequisite for efficient solar selective absorption NiO-based cermets, confirmed by high S value obtained for Ni-NiCrO x cermet (Ni-NiO particles embedded in Cr 2 O 3 -NiO matrix).…”

Section: Solar Absorber Coatingsmentioning

confidence: 99%

Spectrally Solar Selective Coatings for Colored Flat Plate Solar Thermal Collectors

Isac

Eneşca

Mihoreanu

et al. 2014

Springer Proceedings in Energy

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The paper is a review on the state-of-the-art on colored materials (absorbers and glazings) for solar thermal flat plate collectors obtained world-wide. The best results obtained by the group active in the R&D Centre Renewable Energy Systems and Recycling are also reported and they are related to the steps followed in developing and optimizing the absorber plate (substrate, the alumina matrix, the colored coatings and the anti-reflexion layer) and the glazing (as anti-reflexive coating and/or as colored component). These results represent a promising input for novel, market-acceptable flat plate solar-thermal collectors, with increased architectural acceptance, for facades integration in Nearly Zero Energy Buildings.

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“…20 The applicability of this material to the development of solar thermal collectors was presented with details in Ref. 19.…”

Section: Optimization Of a Solar Thermal Collectormentioning

confidence: 99%

“…[18][19] α represents the fraction of the solar spectrum that is effectively absorbed by the system. ε represents the fraction of the spectrum of a blackbody heated at 373 K that will escape the system (equivalent of thermal losses).…”

Section: Optimization Of a Solar Thermal Collectormentioning

confidence: 99%

Genetic algorithms used for the optimization of light-emitting diodes and solar thermal collectors

et al. 2014

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We present a genetic algorithm (GA) we developed for the optimization of light-emitting diodes (LED) and solar thermal collectors. The surface of a LED can be covered by periodic structures whose geometrical and material parameters must be adjusted in order to maximize the extraction of light. The optimization of these parameters by the GA enabled us to get a light-extraction efficiency η of 11.0% from a GaN LED (for comparison, the flat material has a light-extraction efficiency η of only 3.7%). The solar thermal collector we considered consists of a waffle-shaped Al substrate with NiCrO x and SnO 2 conformal coatings. We must in this case maximize the solar absorption α while minimizing the thermal emissivity ϵ in the infrared. A multi-objective genetic algorithm has to be implemented in this case in order to determine optimal geometrical parameters. The parameters we obtained using the multi-objective GA enable α~97.8% and ϵ~4.8%, which improves results achieved previously when considering a flat substrate. These two applications demonstrate the interest of genetic algorithms for addressing complex problems in physics.

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Revealing the innermost nanostructure of sputtered NiCrOx solar absorber cermets

Cited by 24 publications

References 20 publications

Effects of antireflection layers on the optical and thermal stability properties of a spectrally selective CrAlN–CrAlON based tandem absorber

Effects of antireflection layers on the optical and thermal stability properties of a spectrally selective CrAlN–CrAlON based tandem absorber

Spectrally Solar Selective Coatings for Colored Flat Plate Solar Thermal Collectors

Genetic algorithms used for the optimization of light-emitting diodes and solar thermal collectors

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