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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28953–28962

Nano-Cr-film-based solar selective absorber with high photo-thermal conversion efficiency and good thermal stability

Wei-Xi Zhou, Yan Shen, Er-Tao Hu, Yuan Zhao, Ming-Yu Sheng, Yu-Xiang Zheng, Song-You Wang, Young-Pak Lee, Cai-Zhuang Wang, David W. Lynch, and Liang-Yao Chen  »View Author Affiliations

Optics Express, Vol. 20, Issue 27, pp. 28953-28962 (2012)

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Optical properties and thermal stability of the solar selective absorber based on the metal/dielectric four-layer film structure were investigated in the variable temperature region. Numerical calculations were performed to simulate the spectral properties of multilayer stacks with different metal materials and film thickness. The typical four-layer film structure using the transition metal Cr as the thin solar absorbing layer [SiO2(90nm)/Cr(10nm)/SiO2(80nm)/Al (≥100nm)] was fabricated on the Si or K9 glass substrate by using the magnetron sputtering method. The results indicate that the metal/dielectric film structure has a good spectral selective property suitable for solar thermal applications with solar absorption efficiency higher than 95% in the 400-1200nm wavelength range and a very low thermal emittance in the infrared region. The solar selective absorber with the thin Cr layer has shown a good thermal stability up to the temperature of 873K under vacuum atmosphere. The experimental results are in good agreement with the calculated spectral results.

© 2012 OSA

OCIS Codes
(160.6840) Materials : Thermo-optical materials
(230.4170) Optical devices : Multilayers
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Solar Energy

Original Manuscript: November 12, 2012
Revised Manuscript: December 5, 2012
Manuscript Accepted: December 5, 2012
Published: December 12, 2012

Wei-Xi Zhou, Yan Shen, Er-Tao Hu, Yuan Zhao, Ming-Yu Sheng, Yu-Xiang Zheng, Song-You Wang, Young-Pak Lee, Cai-Zhuang Wang, David W. Lynch, and Liang-Yao Chen, "Nano-Cr-film-based solar selective absorber with high photo-thermal conversion efficiency and good thermal stability," Opt. Express 20, 28953-28962 (2012)

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