Abstract
Structural absorption is widely accepted as an effective way to produce super black materials, which show matte black appearance and extremely broadband low reflectance. We have developed an ultrafast pulsed laser deposition (PLD) technology to deposit thin super black film by tuning the surface microstructure. Various coatings made by Fe, Al and Ti all showed broadband absorption, confirming that the PLD method is suitable for fabricating super back materials. At the wide range of wavelength from 250 nm to 2000 nm, the total integrated reflectance of iron coating is ~1.2%. The super black iron surface coating has low volume density composed of separated tree-like aggregates of nanoparticles. We have demonstrated that low effective refractive index and multi-layered iron oxide structures are the two contributing factors for the broadband ultralow reflectance. The broadband high-performance film was employed to effectively convert sunlight to heat. The steady-state temperature of the super black surface is 76 °C under solar irradiation.
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.
