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Abstract
Photothermal effect that producing thermal energy from solar energy at a high efficiency provides a new approach for solar harvesting, which can be further used for electricity generation. Herein, an emerging solar-thermal-electric conversion system is developed based on combination of photo-thermal and thermal-electric effects. Highly-efficient, scalable, renewable, and cost-effective Cu nanoparticles gown on Zn foil (Cu NPs@Zn foil), carbonized kelps-cellulose membrane composite (Ck@membrane), and reduced graphene oxide coated on nickel foam (RGO@Ni foam) are fabricated as the photothermal nanoabsorber layers for this solar-thermal-electric conversion system. A small prototype device of 40 mm × 40 mm based on Cu NPs@Zn foil can provide an output voltage about 0.20 V under 1 sun irradiation. To demonstrate the practical applications, the electricity converted from solar energy is used to power a LED and a 51 single chip microcomputer successfully.
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