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.

本文展示了基于高熵薄膜的太阳选择性吸收涂层的截止波长的固有调制。（NiCuCrFeSi）N（（NCCFS）N）膜通过磁控溅射系统沉积。卢瑟福背散射光谱分析证实了这些高熵薄膜的均匀组成和良好的均匀性。（NCCFS）N材料的介电常数的实部和虚部是根据反射光谱拟合结果计算得出的。由于改变氮含量时色散水平不同，因此存在反射率光谱的红移截止波长随氮气流量的增加而变化。为了实现显着的太阳能吸收，通过设计金字塔纳米结构超颖表面，将薄膜表面重建为与空气匹配的阻抗。与沉积膜的吸收率相比，设计的超表面在吸收率从0.74增加到0.99的情况下获得了太阳吸收的显着改善。超颖表面还显示出较低的中红外辐射，其热辐射率可低至0.06。这些结果证明了在具有选择性可控吸收率和低红外发射率的太阳能选择性吸收表面的设计中实现高效光热转换的新思路。