发射率
辐射冷却
辐射传输
吸收(声学)
太阳能
热的
物理
能量(信号处理)
光学
工作(物理)
材料科学
计算物理学
天体物理学
气象学
热力学
生物
量子力学
生态学
作者
Xianze Ao,Bowen Li,Bin Zhao,Mingke Hu,Hui Ren,Honglun Yang,Jie Liu,Jingyu Cao,Jianmei Feng,Yuanjun Yang,Zeming Qi,Liangbin Li,Chongwen Zou,Gang Pei
标识
DOI:10.1073/pnas.2120557119
摘要
Significance The sun (∼6,000 K) and outer space (∼3 K) are two natural energy resources for humans. However, most of the approaches of energy harvesting from the sun and rejecting energy to outer space are achieved independently using absorbers and emitters with static spectral properties. Herein, a spectrally self-adaptive structure with strong solar absorption and switchable emissivity within the atmospheric window (i.e., 8 to 13 μm) is experimentally demonstrated to achieve diurnal solar thermal and nocturnal radiative cooling efficiently. The experiment shows that the proposed structure not only can be heated to 185°C in diurnal mode but also be cooled to −12°C in nocturnal mode. This work opens new possibilities for continuously efficient energy harvesting utilizing the sun and the universe.
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