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

作　　者：Ping Song Cong Wang Jie Ren Ying Sun Yong Zhang Angélique Bousquet Thierry Sauvage Eric Tomasella 

机构地区：[1]Center for Condensed Matter and Material Physics,Beihang University,Beijing 100083,China [2]Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao 066004,China [3]Beijing Advanced Innovation Center of Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China [4]UniversitéClermont Auvergne,Centre national de la recherche scientifique(CNRS),SIGMA Clermont,Institut de Chimie de Clermont-Ferrand(ICCF),Clermont-Ferrand F-63000,France [5]Extreme Conditions and Materials:High Temperature and Irradiation(CEMHTI-UPR 3079 CNRS,Orléans F-45100,France

出　　处：《International Journal of Minerals,Metallurgy and Materials》2020年第10期1371-1378,共8页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51732001,U1832219,and 51972013);Beijing Natural Science Foundation(No.2182035);the Fundamental Research Funds for the Central Universities,the Program of China Scholarships Council(No.201806020161);the Academic Excellence Foundation of Beihang University(BUAA)for Ph.D.Students.

摘　　要：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.

关 键 词：cutoff wavelength solar selective absorption infrared emission NANOSTRUCTURE high-entropy film 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TK512[动力工程及工程热物理—热能工程]