Affiliation:
1. Jimei University
2. Fujian Provincial Key Laboratory of Oceanic Information Perception and Intelligent Processing
3. University of Electronic Science and Technology of China
Abstract
Passive power generation has recently stimulated interest in thermoelectric generators (TEGs) using the radiative cooling mechanism. However, the limited and unstable temperature difference across the TEGs significantly degrades the output performance. In this study, an ultra-broadband solar absorber with a planar film structure is introduced as the hot side of the TEG to increase the temperature difference by utilizing solar heating. This device not only enhances the generation of electrical power but also realizes all-day uninterrupted electrical output due to the stable temperature difference between the cold and hot sides of the TEG. Outdoor experiments show the self-powered TEG obtains maximum temperature differences of 12.67 °C, 1.06 °C, and 5.08 °C during sunny daytime, clear nighttime, and cloudy daytime, respectively, and generates output voltages of 166.2 mV, 14.7 mV, and 95 mV, respectively. Simultaneously, the corresponding output powers of 879.25 mW/m2, 3.85 mW/m2, and 287.27 mW/m2 are produced, achieving 24-hour uninterrupted passive power generation. These findings propose a novel strategy to combine solar heating and outer space cooling by a selective absorber/emitter to generate all-day continuous electricity for unsupervised small devices.
Funder
National Natural Science Foundation of China
Youth Talent Support Program of Fujian Province
Science Fund for Distinguished Young Scholars of Fujian Province
Science and Technology Major Project of Fujian Province
Innovation Fund for Young Scientists of Xiamen
Marine and Fishery Development Special Fund of Xiamen
Youth Talent Support Program of Jimei University
Xiamen Ocean and Fishery Development Special Fund Project
Xiamen Key Laboratory of Marine Intelligent Terminal R&D and Application
Scientific Research Foundation of Jimei University
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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