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Thermoelectric materials with crystal-amorphicity duality induced by large atomic size mismatch
- Source :
- Zhao, K, Eikeland, E, He, D, Qiu, W, Jin, Z, Song, Q, Wei, T R, Qiu, P, Liu, J, He, J, Iversen, B B, He, J, Chen, L & Shi, X 2021, ' Thermoelectric materials with crystal-amorphicity duality induced by large atomic size mismatch ', Joule, vol. 5, no. 5, pp. 1183-1195 . https://doi.org/10.1016/j.joule.2021.03.012
- Publication Year :
- 2021
-
Abstract
- Discovering novel materials and attaining higher performance are the eternal pursuit of thermoelectric materials research. Here, we report a material series, (Cu1−xAgx)2(Te1−ySy) (0.16 ≤ x ≤ 0.24, 0.16 ≤ y ≤ 0.24), which adopts a complex orthorhombic structure differing from any known crystal structure of (Cu/Ag)2(S/Te). This material series is featured by the crystal-amorphicity duality induced by the large anionic size mismatch: a crystalline sublattice of highly size-mismatched anions Te/S coexists with an amorphous-like sublattice of cations Cu/Ag. In the context of structure-property correlation, the crystal-amorphicity duality gave rise to not only interesting electrical properties but also exceptionally low lattice thermal conductivities from 300 to 1,000 K. A state-of-the-art figure of merit zT of 2.0 is obtained in the x = y = 0.22 sample at 1,000 K. These results give insights into crystal-amorphicity duality as a paradigm-shifting materials design approach to develop high-performance thermoelectric materials.
- Subjects :
- Materials science
THERMAL-CONDUCTIVITY
Duality (optimization)
Context (language use)
02 engineering and technology
Crystal structure
010402 general chemistry
sublattice
thermoelectric
01 natural sciences
Crystal
crystal-amorphicity duality
Thermoelectric effect
thermal conductivity
CHALCOGENIDES
Condensed matter physics
PERFORMANCE
021001 nanoscience & nanotechnology
Thermoelectric materials
TRANSPORT
0104 chemical sciences
General Energy
Atomic radius
atomic size mismatch
Orthorhombic crystal system
PHASE-TRANSITIONS
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Zhao, K, Eikeland, E, He, D, Qiu, W, Jin, Z, Song, Q, Wei, T R, Qiu, P, Liu, J, He, J, Iversen, B B, He, J, Chen, L & Shi, X 2021, ' Thermoelectric materials with crystal-amorphicity duality induced by large atomic size mismatch ', Joule, vol. 5, no. 5, pp. 1183-1195 . https://doi.org/10.1016/j.joule.2021.03.012
- Accession number :
- edsair.doi.dedup.....cba79c17a7f6ec1c6c557c6b164c949b