Multilayered metal-dielectric film structure for highly efficient solar selective absorption

• Published in: Materials research express Vol. 5; no. 6; pp. 66428 - 66435
• Main Authors: Hu, Er-Tao, Liu, Xin-Xing, Yao, Yuan, Zang, Kai-Yan, Tu, Zong-Jie, Jiang, An-Qing, Yu, Ke-Han, Zheng, Jia-Jin, Wei, Wei, Zheng, Yu-Xiang, Zhang, Rong-Jun, Wang, Song-You, Zhao, Hai-Bin, Yoshie, Osamu, Lee, Young-Pak, Wang, Cai-Zhuang, Lynch, David W, Guo, Jun-Peng, Chen, Liang-Yao
• Format: Journal Article
• Language: English
• Published: IOP Publishing 29.06.2018
• Subjects: metal-dielectric film structure; photo-to-thermal conversion; solar absorptance; solar selective absorber
• ISSN: 2053-1591; 2053-1591
• DOI: 10.1088/2053-1591/aacdb3

To improve the optical absorptance of a solar selective absorber over a wide wavelength range, an eight-layered metal-dielectric film structure was designed by the transfer matrix method and fabricated with the magnetron sputtering method. The experimental results showed that the multilayered film structure yields a high solar absorptance of 98.3% with excellent spectral selectivity over a wide angular range in the solar radiation region of 250-2000 nm, a total hemispherical emittance of 0.12 at 400 K, and nearly unchanged reflectance after heat treatment at 673 K for 48 h in vacuum, indicating the high efficiency of the photo-to-thermal conversion achieved for the sample to have the potential being practically applied in many fields.