材料科学
共发射极
辐射冷却
光电子学
辐射传输
红外线的
选择性表面
热发射率
基质(水族馆)
发射率
光学
气象学
物理
海洋学
地质学
梁(结构)
作者
Chongjia Lin,Yang Li,Cheng Chi,Ye Seul Kwon,Jingyuan Huang,Zuoxu Wu,Jiongzhi Zheng,Gongze Liu,Chi Yan Tso,Chi‐Chur Chao,Baoling Huang
标识
DOI:10.1002/adma.202109350
摘要
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 SiOx Ny 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.
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