A dual-selective thermal emitter with enhanced subambient radiative cooling performance

Xueke Wu, Jinlei Li, Fei Xie, Xun-En Wu, Siming Zhao, Qinyuan Jiang, Shiliang Zhang, Baoshun Wang, Yunrui Li, Di Gao, Run Li, Fei Wang, Ya Huang, Yanlong Zhao, Yingying Zhang, Wei Li, Jia Zhu and Rufan Zhang ()
Additional contact information
Xueke Wu: Tsinghua University
Jinlei Li: Nanjing University
Fei Xie: Chinese Academy of Sciences
Xun-En Wu: Tsinghua University
Siming Zhao: Tsinghua University
Qinyuan Jiang: Tsinghua University
Shiliang Zhang: Tsinghua University
Baoshun Wang: Tsinghua University
Yunrui Li: Tsinghua University
Di Gao: Tsinghua University
Run Li: Tsinghua University
Fei Wang: Tsinghua University
Ya Huang: Tsinghua University
Yanlong Zhao: Tsinghua University
Yingying Zhang: Tsinghua University
Wei Li: Chinese Academy of Sciences
Jia Zhu: Nanjing University
Rufan Zhang: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Radiative cooling is a zero-energy technology that enables subambient cooling by emitting heat into outer space (~3 K) through the atmospheric transparent windows. However, existing designs typically focus only on the main atmospheric transparent window (8–13 μm) and ignore another window (16–25 μm), under-exploiting their cooling potential. Here, we show a dual-selective radiative cooling design based on a scalable thermal emitter, which exhibits selective emission in both atmospheric transparent windows and reflection in the remaining mid-infrared and solar wavebands. As a result, the dual-selective thermal emitter exhibits an ultrahigh subambient cooling capacity (~9 °C) under strong sunlight, surpassing existing typical thermal emitters (≥3 °C cooler) and commercial counterparts (as building materials). Furthermore, the dual-selective sample also exhibits high weather resistance and color compatibility, indicating a high practicality. This work provides a scalable and practical radiative cooling design for sustainable thermal management.

Date: 2024
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DOI: 10.1038/s41467-024-45095-4

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