ArticleMacromolecular rapid communications2026
Correlating Mid-Infrared Absorption With Radiative Efficiency in Passive Daytime Radiative Cooling Systems.
Article in Macromolecular rapid communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Passive daytime radiative coolers (PDRCs) are physical systems capable, on the Earth's surface, of achieving a net irradiation of energy toward outer space even under direct solar illumination. In order to achieve this amazing feat, PDRCs require tailored photonic properties all the way from the near-ultraviolet to the mid-infrared (mid-IR). In particular, PDRCs require high reflectivity over the solar-radiation range and selective absorbance (or equivalently emittance) in the mid-IR atmospheric transparency window. In this study we fabricated PDRCs composed of silica-loaded poly(4-methyl-1-pentene) thin films hot-pressed onto Ag-coated stainless-steel slabs, and we correlated the photonic response of these systems with their thermodynamic radiative efficiency. We clearly show that the presence of a strong emittance across the mid-IR range corresponds to a higher radiative power around room temperature, thereby establishing a clear quantitative criterion for PDRC assessment.
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