Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit
Abstract Thermoelectric (TE) materials offer a promising pathway toward achieving carbon neutrality by converting waste heat into electricity. The enhancement of their figure-of-merit (zT) depends on optimizing the composition of materials and nanostructures, reducing the thermal conductivity, and i...
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| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-12345-4 |
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| author | Masahiro Goto Michiko Sasaki Taku Moronaga Toru Hara Yibin Xu |
| author_facet | Masahiro Goto Michiko Sasaki Taku Moronaga Toru Hara Yibin Xu |
| author_sort | Masahiro Goto |
| collection | DOAJ |
| description | Abstract Thermoelectric (TE) materials offer a promising pathway toward achieving carbon neutrality by converting waste heat into electricity. The enhancement of their figure-of-merit (zT) depends on optimizing the composition of materials and nanostructures, reducing the thermal conductivity, and increasing the power factor. Cu2Se, a superionic material, achieves a zT of 0.4 at 300 K by facilitating Cu ion movement within its face-centered cubic lattice, effectively suppressing thermal conductivity. Herein, we present a novel TE material developed by doping CuxSe crystals of different compositions with FeSi2. We report a remarkable zT of 0.69 at 298 K for Cu2Se-based materials and reveal the presence of the CuO and Cu2O tiny crystals on the material surface, uniform dispersion of Si within the film, and formation of distinctive amorphous FeO. Our strategy holds great potential for notably advancing waste heat recovery in sustainable TE materials. |
| format | Article |
| id | doaj-art-33ad50cfd5e94755a37f7654e5c32bf1 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-33ad50cfd5e94755a37f7654e5c32bf12025-08-20T03:05:21ZengNature PortfolioScientific Reports2045-23222025-07-0115111010.1038/s41598-025-12345-4Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of meritMasahiro Goto0Michiko Sasaki1Taku Moronaga2Toru Hara3Yibin Xu4Thermal Energy Materials Group, Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)Thermal Energy Materials Group, Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)Electron Microscopy Unit, Materials Fabrication and Analysis Platform, Research Network and Facility Services Division, National Institute for Materials Science (NIMS)Microstructure Analysis Group, Research Center for Structural Materials, National Institute for Materials Science (NIMS)Data-Driven Inorganic Materials Group, Center for Basic Research on Materials, National Institute for Materials Science (NIMS)Abstract Thermoelectric (TE) materials offer a promising pathway toward achieving carbon neutrality by converting waste heat into electricity. The enhancement of their figure-of-merit (zT) depends on optimizing the composition of materials and nanostructures, reducing the thermal conductivity, and increasing the power factor. Cu2Se, a superionic material, achieves a zT of 0.4 at 300 K by facilitating Cu ion movement within its face-centered cubic lattice, effectively suppressing thermal conductivity. Herein, we present a novel TE material developed by doping CuxSe crystals of different compositions with FeSi2. We report a remarkable zT of 0.69 at 298 K for Cu2Se-based materials and reveal the presence of the CuO and Cu2O tiny crystals on the material surface, uniform dispersion of Si within the film, and formation of distinctive amorphous FeO. Our strategy holds great potential for notably advancing waste heat recovery in sustainable TE materials.https://doi.org/10.1038/s41598-025-12345-4ThermoelectricCu2SeSputterThin filmCompositeFeSi2 |
| spellingShingle | Masahiro Goto Michiko Sasaki Taku Moronaga Toru Hara Yibin Xu Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit Scientific Reports Thermoelectric Cu2Se Sputter Thin film Composite FeSi2 |
| title | Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit |
| title_full | Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit |
| title_fullStr | Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit |
| title_full_unstemmed | Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit |
| title_short | Room-temperature FeSi2-doped Cu2Se thermoelectric films with enhanced figure of merit |
| title_sort | room temperature fesi2 doped cu2se thermoelectric films with enhanced figure of merit |
| topic | Thermoelectric Cu2Se Sputter Thin film Composite FeSi2 |
| url | https://doi.org/10.1038/s41598-025-12345-4 |
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