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説明:

We propose a tungsten-based broadband resonator capable of achieving near-perfect solar absorption with suppressed radiative heat loss. Across the entire solar radiation spectrum, the absorber exhibits a spectrally integrated total solar absorptance of 95%. Taking into account the thermal emission under an operating temperature of 100°C, the photothermal conversion efficiency remains as high as 92%-93%. Using the Particle Swarm Optimization, the initial square-based structure is transformed into the adjacent and closely packed strip structures with multiple lengths to achieve enhanced solar absorption. The analysis uses finite-difference time-domain simulations, considering light polarization, incident angle, and structural defects. We proposed a new metamaterial structure with multiple strips that are more efficient, and has simpler geometric structures, such as compared to multilayer films, pyramids, or cone structures, which mostly exhibit substantial radiative heat losses. The structure is composed of a W/SiO₂/W (Metal-Insulator-Metal) configuration, with a surface nanostructure pattern composed of low-emissivity tungsten, with fabrication error-tolerant computational design.

権利情報:

• In Copyright
  

キーワード: solar heat absorber, tungsten, silicon oxide, metal-insulator-metal, starfish

刊行年月日: 2025-10-29

出版者: Royal Society of Chemistry (RSC)

掲載誌:

• Physical Chemistry Chemical Physics (ISSN: 14639076) vol. 27 issue. 48 p. 25868-25875

研究助成金:

• National Science and Technology Council 112-2926-I-002-510-G
• National Science and Technology Council 114-2926-I-002-505-G

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6095

公開URL: https://doi.org/10.1039/d5cp03164h

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更新時刻: 2026-04-30 12:01:11 +0900

MDRでの公開時刻: 2026-10-29 08:28:24 +0900