Abstract
Here, we have theoretically proposed an ideal structure of selective solar absorber with multilayer planar films, which can absorb the incident light throughout the entire solar spectrum (300–2500 nm) and over a wide angular range, whatever the polarization angle of 0°~90°. The efficiency of the proposed absorber is proven by the Finite-Difference Time Domain (FDTD) simulation. The average absorption rate over the solar spectrum is up to 96.6%. The planar design is extremely easy to fabricate and modify, and this structure does not require lithographic processes to finish the absorbers. Improvements of the solar absorber on the basis of planar multilayer-film structures is attributed to multiple asymmetric highly lossy Fabry–Perot resonators. Because of having many virtues, such as using different refractory and non-noble metals, having angle and polarization independence, and having ideal absorption for entire solar spectrum, our proposed absorbers are promising candidates for practical industrial production of the solar-energy harvesting.
Highlights
In the past decade, the increasing cost of fossil fuels and the global warming problem have increased the urgency of the need to develop renewable green energy [1].Because of having the properties of security, universality, and other advantages, the transformation solar energy to useful energies has been a field of intensive researches in recent years
Since our proposed absorber has a structure composed of multilayer planar films, we analyzed the
Since our proposed absorber has a structure composed of multilayer planar films, we analyzed structure with Fe-SiO2 -Fe, firstly so as to further analyze the ideal broadband absorption
Summary
The increasing cost of fossil fuels and the global warming problem have increased the urgency of the need to develop renewable green energy (such as solar, wind, tidal, etc.) [1].Because of having the properties of security, universality, and other advantages, the transformation solar energy to useful energies has been a field of intensive researches in recent years. We propose a high-efficiency absorber with simple a multilayer structure, which could enable omnidirectional, polarization-independent, and broadband absorption across the entire solar bandwidth.
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