A high-temperature solar selective absorber based upon periodic shallow microstructures coated by multi-layers using atomic layer deposition

Makoto Shimizu, Hiroki Akutsu, Shinichiro Tsuda, Fumitada Iguchi, Hiroo Yugami

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Regarding the fabrication of solar selective absorbers, the ability to create microstructures on top of metal surfaces is a promising technology. Typically, these materials are able to possess spectrally-selective absorption properties for high-temperature usage. Solar-selective absorbers that function at temperatures up to 700 °C and possess shallow honeycomb cylindrical microcavities coated with a metal-dielectric multi-layer have been investigated. Honeycomb array cylindrical microcavities were fabricated on W substrate with interference lithography and multi-layers consisting of Pt nano-film sandwiched by Al2O3 layers were created for a uniform coating via atomic layer deposition. The absorbance spectrum of fabricated samples reveals results consistent with a simulation based on a rigorous coupled-wave analysis method. A solar absorbance value of 0.92 and a hemispherical total emittance value of 0.18 at 700 °C was determined from the fabricated solar-selective absorber. Additionally, thermal stability of up to 700 °C was confirmed in vacuum.

Original languageEnglish
Article number13
JournalPhotonics
Volume3
Issue number2
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • Atomic layer deposition
  • High temperature materials
  • Microcavity
  • Multi-layer
  • Selective solar absorbers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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