Abstract
Conversion of solar energy into thermal energy helps reducing consumption of non-renewable energies. Cermets (ceramic-metal composites) are versatile materials suitable, amongst other applications, for solar selective absorbers. The presence of metallic Ni nanoparticles (NPs) in the dielectric matrix is a prerequisite for efficient solar selective absorption in NiCrOx cermets (Zhao and Wackelgard, Solar Energy Mater Solar Cells 90:1861–1874, 2006). By combining comprehensive chemical and structural analyses, but also electronic microscopy, we revealed the origin of the remarkable optical properties of this cermet material. A solar absorber multilayer stack on aluminium substrate using a sputtered NiCrOx layers allows us to achieve solar absorptance as high as α = 96. 1 % while keeping thermal emissivity as low as ε = 2. 2 % both values are comparable to best values recorded so far (Buhrman, Physics of solar selective surfaces. In: Ber (ed) Advances in solar energy. Springer, New York, pp 207–282, 1986). Determining the origin of sputtered NiCrOx cermets optical properties drives further optimization of solar absorbers.
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FormalPara AbstractConversion of solar energy into thermal energy helps reducing consumption of non-renewable energies. Cermets (ceramic-metal composites) are versatile materials suitable, amongst other applications, for solar selective absorbers. The presence of metallic Ni nanoparticles (NPs) in the dielectric matrix is a prerequisite for efficient solar selective absorption in NiCrOx cermets (Zhao and Wackelgard, Solar Energy Mater Solar Cells 90:1861–1874, 2006). By combining comprehensive chemical and structural analyses, but also electronic microscopy, we revealed the origin of the remarkable optical properties of this cermet material. A solar absorber multilayer stack on aluminium substrate using a sputtered NiCrOx layers allows us to achieve solar absorptance as high as α = 96. 1 % while keeping thermal emissivity as low as ε = 2. 2 % both values are comparable to best values recorded so far (Buhrman, Physics of solar selective surfaces. In: Ber (ed) Advances in solar energy. Springer, New York, pp 207–282, 1986). Determining the origin of sputtered NiCrOx cermets optical properties drives further optimization of solar absorbers.
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Gaouyat, L., He, Z., Colomer, JF., Schryvers, D., Mirabella, F., Deparis, O. (2015). Linking Optical Properties and Nanostructure of NiCrOx Cermet Nanocomposite for Solar Thermal Application. In: Di Bartolo, B., Collins, J., Silvestri, L. (eds) Nano-Structures for Optics and Photonics. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9133-5_42
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DOI: https://doi.org/10.1007/978-94-017-9133-5_42
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