Issue

Vol. 17 (2025)

Recent Advances in Spectrally Selective Daytime Radiative Cooling Materials

https://doi.org/10.1007/s40820-025-01771-8
An‑Quan Xie
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China
Hui Qiu
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China
Wangkai Jiang
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China
Yu Wang
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China
Shichao Niu
Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, People’s Republic of China
Ke‑Qin Zhang
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China
Ghim Wei Ho
Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
Xiao‑Qiao Wang
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, People’s Republic of China

Corresponding Author: Xiao‑Qiao Wang

xqwang@suda.edu.cn

Nano-Micro Letters, Vol. 17 (2025), Article Number: 264

Abstract

Daytime radiative cooling is an eco-friendly and passive cooling technology that operates without external energy input. Materials designed for this purpose are engineered to possess high reflectivity in the solar spectrum and high emissivity within the atmospheric transmission window. Unlike broadband-emissive daytime radiative cooling materials, spectrally selective daytime radiative cooling (SSDRC) materials exhibit predominant mid-infrared emission in the atmospheric transmission window. This selective mid-infrared emission suppresses thermal radiation absorption beyond the atmospheric transmission window range, thereby improving the net cooling power of daytime radiative cooling. This review elucidates the fundamental characteristics of SSDRC materials, including their molecular structures, micro- and nanostructures, optical properties, and thermodynamic principles. It also provides a comprehensive overview of the design and fabrication of SSDRC materials in three typical forms, i.e., fibrous materials, membranes, and particle coatings, highlighting their respective cooling mechanisms and performance. Furthermore, the practical applications of SSDRC in personal thermal management, outdoor building cooling, and energy harvesting are summarized. Finally, the challenges and prospects are discussed to guide researchers in advancing SSDRC materials.


Highlights:
1 This review comprehensively presents recent advancements in spectrally selective daytime radiative cooling (SSDRC) materials, focusing on their fundamental characteristics, primarily concerning their structures and properties.
2 The fabrication principles and corresponding operational mechanisms of several typical SSDRC materials are systematically introduced.
3 Based on the latest research, this review highlights the innovative applications in personal thermal management, outdoor building cooling, and energy harvesting, while also discussing the challenges and prospects for the future development of daytime radiative cooling.

Keywords

Daytime radiative cooling Spectrum-selective emission Metamaterials Personal thermal management Energy harvesting
Xie, An‑Quan, Hui Qiu, Wangkai Jiang, Yu Wang, Shichao Niu, Ke‑Qin Zhang, Ghim Wei Ho, and Xiao‑Qiao Wang. 2025. “Recent Advances in Spectrally Selective Daytime Radiative Cooling Materials”. Nano-Micro Letters 17 (May):264. https://doi.org/10.1007/s40820-025-01771-8.
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