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Unraveling the optoelectronic properties of CoSbx intrinsic selective solar absorber towards high-temperature surfaces
Ca Foscari Univ Venice, Italy.
Ca Foscari Univ Venice, Italy.
Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
Lulea Univ Technol, Sweden.
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2023 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 14, no 1, article id 7280Article in journal (Refereed) Published
Abstract [en]

The combination of the ability to absorb most of the solar radiation and simultaneously suppress infrared re-radiation allows selective solar absorbers (SSAs) to maximize solar energy to heat conversion, which is critical to several advanced applications. The intrinsic spectral selective materials are rare in nature and only a few demonstrated complete solar absorption. Typically, intrinsic materials exhibit high performances when integrated into complex multilayered solar absorber systems due to their limited spectral selectivity and solar absorption. In this study, we propose CoSbx (2 < x < 3) as a new exceptionally efficient SSA. Here we demonstrate that the low bandgap nature of CoSbx endows broadband solar absorption (0.96) over the solar spectral range and simultaneous low emissivity (0.18) in the mid-infrared region, resulting in a remarkable intrinsic spectral solar selectivity of 5.3. Under 1 sun illumination, the heat concentrates on the surface of the CoSbx thin film, and an impressive temperature of 101.7 degrees C is reached, demonstrating the highest value among reported intrinsic SSAs. Furthermore, the CoSbx was tested for solar water evaporation achieving an evaporation rate of 1.4 kg m(-2) h(-1). This study could expand the use of narrow bandgap semiconductors as efficient intrinsic SSAs with high surface temperatures in solar applications.

Place, publisher, year, edition, pages
NATURE PORTFOLIO , 2023. Vol. 14, no 1, article id 7280
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-200283DOI: 10.1038/s41467-023-42839-6ISI: 001103647500019PubMedID: 37949914OAI: oai:DiVA.org:liu-200283DiVA, id: diva2:1829996
Note

Funding Agencies|Kempe Foundations; Knut och Alice Wallenberg Foundation; Lulea University of Technology (Labfund program); European Union; Mission 4 Component 2 Investment 1.3 - CUP; Goeran Gustafsson foundation; Swedish National Infrastructure for Computing (SNIC); Swedish Research Council; European Commission; Nanoscience Foundry and Fine Analysis (NFFA-MUR Italy Progetti Internazionali); National Recovery and Resilience Plan (NRRP), Mission 04 Component 2 Investment 3.1; [ECS00000043 - CUP]; [H43C22000540006]; [D43C22003090001]; [2018-05973]; [881603]; [861857]; [IR0000027 - CUP]; [B33C22000710006]

Available from: 2024-01-22 Created: 2024-01-22 Last updated: 2024-11-25

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