Issue 14, 2023

Metamaterial ultra-wideband solar absorbers based on a multi-layer structure with cross etching

Abstract

In this paper, we design a solar absorber based on the Si3N4–W–Ti–SiO2 insulator–metal–insulator structure and demonstrate it using the finite difference time domain (FDTD) method. The absorption rate of the absorber consisting of a multi-layer structure with cross etching is over 90% in the bandwidth of 500 nm to 2995 nm with an average absorption rate of 98.3%. There are three peaks at 620 nm, 1002 nm and 1761 nm with peak heights of 99.8%, 99.8% and 99.0%, respectively. By analyzing the distribution of electric and magnetic fields in different sections of the absorber, it is found that the physical mechanism of the structure with high absorptivity is due to the interaction of propagating surface plasmon resonance and local surface plasma resonance. The effects of different structural parameters and the angle of incidence of a light source on the absorber absorption are discussed. The absorber can be used in solar thermal systems, thermal photovoltaics and thermoelectronic devices.

Graphical abstract: Metamaterial ultra-wideband solar absorbers based on a multi-layer structure with cross etching

Article information

Article type
Paper
Submitted
17 Dec 2022
Accepted
09 Mar 2023
First published
28 Mar 2023

Phys. Chem. Chem. Phys., 2023,25, 10136-10142

Metamaterial ultra-wideband solar absorbers based on a multi-layer structure with cross etching

P. Sun, H. Feng, L. Su, S. Nie, X. Li, Y. Zhou, L. Ran and Y. Gao, Phys. Chem. Chem. Phys., 2023, 25, 10136 DOI: 10.1039/D2CP05901K

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