Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Modulation of the cutoff wavelength in the spectra for solar selective absorbing coating based on high-entropy films

Abstract : This paper demonstrates an intrinsic modulation of the cutoff wavelength in the spectra for solar selective absorbing coating based on high-entropy films. The (NiCuCrFeSi)N ((NCCFS)N) films were deposited by a magnetron sputtering system. Rutherford backscattering spectroscopy analysis confirms the uniform composition and good homogeneity of these high-entropy films. The real and imaginary parts of the permittivity for the (NCCFS)N material are calculated on the basis of the reflectance spectral fitting results. A redshift cutoff wavelength of the reflectance spectrum with increasing nitrogen gas flow rate exists because of the different levels of dispersion when changing nitrogen content. To realize significant solar absorption, the film surface was reconstituted to match its impedance with air by designing a pyramid nanostructure metasurface. Compared with the absorptance of the as-deposited films, the designed metasurface obtains a significant improvement in solar absorption with the absorptance increasing from 0.74 to 0.99. The metasurfaces also show low mid-infrared emissions with thermal emittance that can be as low as 0.06. These results demonstrate a new idea in the design of solar selective absorbing surface with controllable absorptance and low infrared emission for high-efficiency photo-thermal conversion.
Document type :
Journal articles
Complete list of metadata

https://hal.uca.fr/hal-03113777
Contributor : Stéphanie Bonnefoy Connect in order to contact the contributor
Submitted on : Monday, January 18, 2021 - 3:39:14 PM
Last modification on : Sunday, June 26, 2022 - 3:03:38 AM

Identifiers

Citation

Ping Song, Cong Wang, Jie Ren, ying Sun, yong Zhang, et al.. Modulation of the cutoff wavelength in the spectra for solar selective absorbing coating based on high-entropy films. International Journal of Minerals, Metallurgy, and Materials, 2020, 27 (10), pp.1371-1378. ⟨10.1007/s12613-020-1982-7⟩. ⟨hal-03113777⟩

Share

Metrics

Record views

29