@article{ae6fdcfbed10441b84b6509112d08a2b,
title = "A Solution-Processed Inorganic Emitter with High Spectral Selectivity for Efficient Subambient Radiative Cooling in Hot Humid Climates",
abstract = "Daytime radiative cooling provides an eco-friendly solution to space cooling with zero energy consumption. Despite significant advances, most state-of-the-art radiative coolers show broadband infrared emission with low spectral selectivity, which limits their cooling temperatures, especially in hot humid regions. Here, an all-inorganic narrowband emitter comprising a solution-derived SiOxNy layer sandwiched between a reflective substrate and a self-assembly monolayer of SiO2 microspheres is reported. It shows a high and diffusive solar reflectance (96.4%) and strong infrared-selective emittance (94.6%) with superior spectral selectivity (1.46). Remarkable subambient cooling of up to 5 °C in autumn and 2.5 °C in summer are achieved under high humidity without any solar shading or convection cover at noontime in a subtropical coastal city, Hong Kong. Owing to the all-inorganic hydrophobic structure, the emitter shows outstanding resistance to ultraviolet and water in long-term durability tests. The scalable-solution-based fabrication renders this stable high-performance emitter promising for large-scale deployment in various climates.",
keywords = "cooling temperature, hot humid climates, inorganic emitters, selective thermal emission, subambient radiative cooling",
author = "Chongjia Lin and Yang Li and Cheng Chi and Kwon, {Ye Seul} and Jingyuan Huang and Zuoxu Wu and Jiongzhi Zheng and Gongze Liu and Tso, {Chi Yan} and Chao, {Christopher Y.H.} and Baoling Huang",
note = "Funding Information: C.L. and Y.L. contributed equally to this work. This work was financially supported by the Bright Dream Robotics of Country Garden (Grant No. UB‐19.005). The authors also thank the support from the Hong Kong Research Grant Council (RGC) via General Research Fund (GRF) account Grant No. 16200518 and Collaborative Research Fund (CRF) account Grant No. C6022‐16G, respectively. This work was also supported in part by the Project of Hetao Shenzhen‐Hong Kong Science and Technology Innovation Cooperation Zone (HZQB‐KCZYB‐2020083). The authors thank Prof. Ronggui Yang at the Huazhong University of Science and Technology, China for the helpful discussions. Funding Information: C.L. and Y.L. contributed equally to this work. This work was financially supported by the Bright Dream Robotics of Country Garden (Grant No. UB-19.005). The authors also thank the support from the Hong Kong Research Grant Council (RGC) via General Research Fund (GRF) account Grant No. 16200518 and Collaborative Research Fund (CRF) account Grant No. C6022-16G, respectively. This work was also supported in part by the Project of Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone (HZQB-KCZYB-2020083). The authors thank Prof. Ronggui Yang at the Huazhong University of Science and Technology, China for the helpful discussions. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
month = mar,
day = "24",
doi = "10.1002/adma.202109350",
language = "English",
volume = "34",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-Blackwell",
number = "12",
}
