Broadband and Efficient Metamaterial Absorber Design Based on Gold-MgF2-Tungsten Hybrid Structure for Solar Thermal Application

• Published in: Micromachines (Basel) Vol. 14; no. 5; p. 1066
• Main Authors: Armghan, Ammar, Alsharari, Meshari, Aliqab, Khaled
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 17.05.2023; MDPI
• Subjects: absorber; Absorbers (materials); Absorption spectra; Algorithms; Alternative energy sources; Broadband; computational; Design; Design optimization; Design parameters; finite element method; Gold; Hybrid structures; Light; Magnesium fluorides; Mathematical optimization; Metamaterials; Narrowband; Near infrared radiation; Numerical methods; Optimization; Photovoltaic cells; Physical properties; Radiation; Renewable resources; Solar cells; Solar energy; Solar energy absorbers; Solar heating; solar thermal energy; Tungsten; absorber; finite element method; broadband; solar thermal energy; computational
• ISSN: 2072-666X; 2072-666X
• DOI: 10.3390/mi14051066

We have presented a solar absorber design with gold-MgF -tungsten materials. The solar absorber design is optimized with nonlinear optimization mathematical method to find and optimize geometrical parameters. The wideband absorber is made of a three-layer structure composed of tungsten, magnesium fluoride, and gold. This study analyzed the absorber's performance using numerical methods over the sun wavelength range of 0.25 μm to 3 μm. The solar AM 1.5 absorption spectrum is a benchmark against which the proposed structure's absorbing characteristics are evaluated and discussed. It is necessary to analyze the behavior of the absorber under a variety of various physical parameter conditions in order to determine the results and structural dimensions that are optimal. The nonlinear parametric optimization algorithm is applied to obtain the optimized solution. This structure can absorb more than 98% of light across the near-infrared and visible light spectrums. In addition, the structure has a high absorption efficiency for the far range of the infrared spectrum and the THz range. The absorber that has been presented is versatile enough to be used in a variety of solar applications, both narrowband and broadband. The design of the solar cell that has been presented will be of assistance in designing a solar cell that has high efficiency. The proposed optimized design with optimized parameters will help design solar thermal absorbers.