Zirconia nanoparticles embedded spinel selective absorber coating for high performance in open atmospheric condition

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

“…Additionally, by analysing the quantified results shown in Figure 2 c, it can be seen that the Cu 2+ dominates in the CuMnO x film against the Cu + species. Regarding the second constituent species of the CuMnO x film, it is observed that the deconvolution curve of Mn 2p 3/2 is composed of three peaks at binding energies of 640.0, 641.5 and 642.9 eV corresponding to Mn 2+ , Mn 3+ and Mn 4+ [ 17 , 38 , 39 , 40 ], respectively, and multiplet split components associated with Mn oxides at binding energies higher than 644 eV [ 17 , 38 , 39 ]. Regarding the site distribution of manganese ions, the majority of works reported in the literature agree that Mn 3+ and Mn 4+ ions occupy preferably octahedral sites and Mn 2+ is found in tetrahedral sites [ 41 , 42 ].…”

“…The service life of a material depends on several variables which influence its behaviour under service conditions such as its physical and chemical properties, its performance requirement in the application considered, and on external environmental factors. Consequently, apart from high spectral selectivity (high absorptance and low emittance in the range of 0.3–2.5 μm and 2.5–17 μm, respectively), solar selective coatings have to possess high chemical and thermal stabilities at typical field operation temperatures or under regular variations in operating temperature [ 17 ].…”

Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers

“…Within the last decade, nanostructured metamaterials have become an attractive topic in the field of radiative heat transfer for thermal energy harvesting ( Bello and Shanmugan, 2020 ; Jin et al., 2016 ; Khodasevych et al., 2015 ; Woolf et al., 2018 ; Xu et al., 2020 ) and radiative cooling ( Raman et al., 2014 ; Zhai et al., 2017 ). For harvesting solar energy to heat, spectrally selective absorbers with high solar absorption and low infrared emission are highly desired for efficient energy conversion, and many metamaterial selective solar absorbers have been designed and experimentally demonstrated recently based on multilayer ( Chirumamilla et al., 2016 , 2019 ; Dyachenko et al., 2016 ; Khoza et al., 2019 ; Thomas et al., 2017 ; Wang et al., 2018 ), periodic tungsten convex or concave gratings ( Jae Lee et al., 2014 ; Wang et al., 2015 ; Wang and Wang, 2013 ), nickel nanopyramids and tungsten nanowires (WNWs)/doughnuts ( Behera and Joseph, 2017 ; Li et al., 2015 ; Tian et al., 2018 ), and nanoporous or nanoparticle composite structures ( Lu et al., 2016 , 2017 ; Prasad et al., 2018 ). Due to their submicron feature sizes, advanced fabrication techniques such as electron-beam lithography and focused-ion beam were usually needed for fabricating these metamaterial structures ( Wang et al., 2015 ), which are expensive with low throughput prohibiting their large-area application.…”

Stress‐Induced Failure Study on a High‐Temperature Air‐Stable Solar‐Selective Absorber Based on W–SiO2 Ceramic Composite

“…For any irreversible process, the efficiency is less than that of the Carnot cycle. Therefore, to maximize Carnot efficiency, the operating temperature of the CSP system is supposed to be as high as possible, [6,7] which brings higher requirement to the solar receiver. On the other hand, reducing the cost of the CSP system is also a workable approach.…”