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Recent Advances in Spectrally Selective Daytime Radiative Cooling Materials
An-Quan Xie1, Hui Qiu1, Wangkai Jiang1
1National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, People's Republic of China.
Nano-Micro Letters
|May 20, 2025
Summary
Spectrally selective daytime radiative cooling (SSDRC) materials enhance passive cooling by emitting heat within the atmospheric window. This review covers SSDRC material design, fabrication, and applications for improved thermal management.
Area of Science:
- Materials Science
- Thermodynamics
- Optics
Background:
- Daytime radiative cooling offers eco-friendly, passive cooling without energy input.
- Materials reflect solar radiation and emit within the atmospheric transmission window.
- Spectrally selective daytime radiative cooling (SSDRC) materials optimize mid-infrared emission.
Purpose of the Study:
- To review the fundamental characteristics of SSDRC materials.
- To provide an overview of SSDRC material design and fabrication.
- To summarize applications and discuss future prospects of SSDRC.
Main Methods:
- Elucidation of molecular structures, micro-/nanostructures, optical properties, and thermodynamic principles.
- Comprehensive overview of design and fabrication in fibrous, membrane, and particle coating forms.
- Summary of practical applications in personal thermal management, building cooling, and energy harvesting.
Main Results:
- SSDRC materials exhibit predominant mid-infrared emission, suppressing off-window absorption.
- Selective emission enhances net cooling power compared to broadband materials.
- Various forms (fibers, membranes, coatings) demonstrate distinct cooling mechanisms and performance.
Conclusions:
- SSDRC materials offer superior passive cooling performance through spectral selectivity.
- Fabrication methods and material structures are key to optimizing cooling efficiency.
- Further research into SSDRC challenges and prospects will advance sustainable thermal management solutions.
