Dear Colleagues,

Coatings used as absorbers are one of the main responsible of the optical and thermal efficiency of the solar thermal systems. They collect the sun energy and transform it into heat. A multilayer structure is necessary to achieve a wavelength selectivity. The appropriate design of each film makes possible to satisfy a high value of absorptance in the solar wavelength range and a low value of thermal emittance in the mid/far infrared wavelength ranges. Furthermore, depending on the working temperature in the solar systems, the solar absorber coatings has to satisfy different conditions which means different requirements in terms of properties and durability.

The purpose of this Special Issue is to collect interesting and original studies about materials used as solar thermal absorbers including topics concerning material engineering, manufacturing technology, theoretical analysis, characterization, durability and definitively, any matter related to the solar absorbers which contributes to improve the solar thermal conversion efficiency and to reduce the technology costs.

We welcome papers regarding absorbers coatings used in solar systems that operates at low, medium and high temperature. The issue is overall focused in absorbers used in concentrated solar power technologies but those used for domestic hot water production or industrial applications are also welcome.

Dr. Gema San Vicente
Guest Editor

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• Absorptance
• Optical coating
• Durability
• Solar thermal systems
• Selective absorbers
• CSP
• Thermal emittance