Abstract
Optical and Thermal Characteristics of Porous Anodic Aluminum Oxide for Photothermal Applications
Highlights
Solar absorption coating technology has been of great interest in recent years because it has been widely used in green energy, optical industries, and sensor applications, such as photothermal sensors, IR sensors, pyranometers, and solar cells
With increasing depth of the periodic structure, the reflectance decreased approached a stable value.[27]. These results show that anodizing can significantly increase the absorption of aluminum alloy and that absorption increases with increasing applied anodic voltage
Antireflective nanoporous anodic aluminum oxide (NPAAO) films on 6061-T6 aluminum alloy were investigated in this study
Summary
Solar absorption coating technology has been of great interest in recent years because it has been widely used in green energy, optical industries, and sensor applications, such as photothermal sensors, IR sensors, pyranometers, and solar cells. The solar-selective absorbing coating films should have efficient solar photothermal conversion and must have high solar absorptivity and low thermal emissivity, especially at high temperatures.[1,2] A spectrally selective surface should capture the maximum solar energy in the high-intensity visible and near-IR spectral regions. Optical reflection can be efficiently suppressed if the refractive index of the coating is equal to the geometric mean of the refractive indices of the two media at the interface and the thickness of the coating is a quarter of the wavelength of light.[5] Introducing a gradual change in the refractive index with an AR layer can suppress reflection.[6,7,8] a multilayer optical coating usually consists of a stack of several layers of absorbing materials with different refractive indices. AR coatings are usually formed on the surface of such stacks to improve the transmission to the absorbing layers.[9]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
