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Photonics 2016, 3(2), 13; doi:10.3390/photonics3020013

A High-Temperature Solar Selective Absorber Based upon Periodic Shallow Microstructures Coated by Multi-Layers Using Atomic Layer Deposition

1
Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
2
Centre de Thermique de Lyon, Unité Mixte de Recherche 5008, Université de Lyon, CNRS, INSA-Lyon, Univ. Lyon 1, Villeurbanne F-69621, France
*
Author to whom correspondence should be addressed.
Received: 29 February 2016 / Revised: 21 March 2016 / Accepted: 22 March 2016 / Published: 29 March 2016
(This article belongs to the Special Issue 3D- and 2D-Nanofabrication for Photonic Devices)
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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. View Full-Text
Keywords: selective solar absorbers; atomic layer deposition; high temperature materials; microcavity; multi-layer selective solar absorbers; atomic layer deposition; high temperature materials; microcavity; multi-layer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shimizu, M.; Akutsu, H.; Tsuda, S.; Iguchi, F.; Yugami, H. A High-Temperature Solar Selective Absorber Based upon Periodic Shallow Microstructures Coated by Multi-Layers Using Atomic Layer Deposition. Photonics 2016, 3, 13.

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