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Selective solar absorbers with tuned oxygen deficiency and methods of fabrication thereof

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TLDR
In this paper, the fabrication of a solar absorber comprising an IR reflector layer on a substrate, a first cermet layer deposited in contact with the IR reflectors, a second anti-reflection layer deposited with the first layer, and an anti-reflective coating layer was presented.
Abstract
Systems and methods disclosed herein are directed towards the fabrication of a solar absorber comprising an IR reflector layer deposited on a substrate; a first cermet layer deposited in contact with the IR reflector layer; a second cermet layer deposited in contact with the first cermet layer; a first anti-reflection coating layer deposited in contact with the second cermet layer; a second anti-reflection coating layer deposited in contact with the first anti-reflection coating layer. A sputtering process may be used to deposit some or all of the layers, and the YSZ layers in each cermet layer may be deposited with a tuned partial oxygen pressure in order to form a layer that is oxygen-deficient.

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Patent

Novel high-temperature solar energy selective absorbing coating

Kang Chufan
TL;DR: In this paper, the authors proposed a novel high-temperature solar energy selective absorbing coating, which consists of an infrared reflecting layer and four layers of anti-reflection layer. But the authors did not specify the number of layers to be used.
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High temperature-stable quasi-optical microcavity-structured solar spectrum selective absorption coating and preparation method thereof

TL;DR: In this paper, a high temperature-stable quasi-optical microcavity-structured solar spectrum selective absorption coating and a preparation method thereof are presented. But the method is not suitable for high temperature.
References
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Patent

High temperature solar selective coatings

TL;DR: In this paper, improved solar selective coatings are applied to the metal surface of the solar absorber tubes, typically stainless steel, antireflective Savers (28) comprising at least two layers of refractory metal or metalloid oxides with substantially differing indices of refraction in adjacent layers.
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Thin film solar selective surface coating

TL;DR: In this paper, a novel solar selective surface coating which is composed of two cermet layers, with different metal volume fractions in each layer, was disclosed, and the layers have thicknesses and volume fractions such that solar radiation is absorbed by internal absorbing and phase cancellation interference, but the Cermet layers are substantially transparent in the thermal infrared region.
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Cermet film selective black absorber

TL;DR: In this article, a selective-black absorber capable of operation at elevated temperatures and high efficiency as a solar energy absorber is described, where a cermet of MgO/Au, Mg O/Pt, and Cr 2 O 3 /Cr is coated on a substrate having high infrared reflectivity such as Mo coated on stainless steel; Ni coated on Cu, or steel; aluminum or steel.
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Surface coating of the collector tube of a linear parabolic solar concentrator

TL;DR: In this paper, a surface coating material for heat collector elements (HCE) of solar plants, formed by a multilayer structure comprising a lower layer of a metal reflecting at the infrared rays (1) and an upper layer of non reflecting material (4), is provided.
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Radiation-selective absorber coating and absorber tube with radiation-selective absorber coating

TL;DR: The radiation-selective absorber coating as discussed by the authors includes a reflective layer which is reflective in the infrared range, a barrier layer arranged below the reflective layer, at least one absorption layer arranged above the reflective layers, an antireflection layer above the absorption layer, and at least an adhesion-enhancing layer arranged between the barrier layer and reflective layer.