Metal and dielectric compounded high-temperature-resistant solar spectrum selective absorption structure

A dielectric composite, solar spectrum technology, applied in the field of high temperature resistant solar spectrum selective absorption structure, can solve the problems of narrow absorption spectrum range, complex structure, oxidation failure, etc., achieve design diversification, prevent diffusion and oxidation, good high temperature resistance performance effect
CN112882138AActive Publication Date: 2021-06-01CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2021-06-01

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Abstract

The invention discloses a metal and dielectric compounded high-temperature-resistant solar spectrum selective absorption structure, and aims to achieve high absorptivity in a wide spectrum from visible light to near-infrared light and realize efficient absorption of solar energy under a high-temperature condition. The structure comprises a bottom metal film, a first dielectric medium film is formed on the bottom layer metal film, an array formed by a plurality of metal nanometer quadrangular star-shaped prisms is formed on the first dielectric medium film, a cylindrical hole is formed in the center of each metal nanometer quadrangular star-shaped prism, the cylindrical holes are filled with dielectric medium filler, a second dielectric film is formed in the periphery of each metal nanometer quadrangular star-shaped prism, a third dielectric film is formed on the metal nanometer quadrangular star-shaped prisms, the dielectric filler and the second dielectric films, and the second dielectric films and the third dielectric films are in quadrangular star shapes.
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Description

technical field

[0001] The invention relates to the technical field of solar energy utilization, in particular to a high temperature resistant solar spectrum selective absorption structure composed of metal and dielectric. Background technique

[0002] Solar energy is a clean, non-polluting renewable energy source, and the use of solar energy can help solve environmental pollution and energy shortage problems. In order to utilize solar energy more efficiently, technologies such as photovoltaic power generation, photothermal power generation, and thermal photovoltaic power generation have been proposed. In the above technologies, a simple and durable solar selective absorption structure is required to capture sunlight; at the same time, the selective absorption structure in photothermal power generation and thermal photovoltaic power generation also needs to have the ability to withstand high temperatures for a long time. Since Wood (Philos.Mag.,1902,4(21):396-402.) first di...

Claims

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