Abstract
Strong absorption in the full solar spectrum is required for efficient usage of solar energy. Near-infrared (NIR) light absorption mainly depends on surface plasmon resonance and a high density of free charge carriers (FCCs). However, increasing FCC density in semiconductors is still a challenge. In this work, we demonstrated that multitudinous S-scheme interface junctions can be constructed within nanoscale Co3O4–Co3(PO4)2, leading to enhanced light absorption of phosphates over the entire solar spectrum due to the increased FCC density and charge-carrier configurations. This absorber can also boost the photothermal performance of Ca(OH)2. The photothermal dehydration conversion of Ca(OH)2 is considerably improved (13.7 times). The reversibility of the photothermal hydration–dehydration cycles of Ca(OH)2 is improved by 39 times. This composite is promising for photothermal conversion and thermal energy storage in one-step.
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