Szczegóły publikacji
Opis bibliograficzny
Origin of low thermal conductivity in $In_{4}Se_{3}$ / Son D. N. Luu, Andrew R. Supka, Van Huy Nguyen, Dai-Viet N. Vo, Nguyen T. Hung, Krzysztof T. WOJCIECHOWSKI, Marco Fornari, Paz Vaqueiro // ACS Applied Energy Materials [Dokument elektroniczny]. - Czasopismo elektroniczne ; ISSN 2574-0962. — 2020 — vol. 3 iss. 12, s. 12549–12556. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 12554–12556, Abstr. — Publikacja dostępna online od: 2020-12-04. — K. T. Wojciechowski - dod. afiliacja: The Lukasiewicz Research Network, The Institute of Advanced Manufacturing Technology, Centre of Thermoelectric Materials Research, Cracow
Autorzy (8)
- Luu Son D. N.
- Supka Andrew R.
- Nguyen Van Huy
- Vo Dai-Viet N.
- Hung Nguyen T.
- AGHWojciechowski Krzysztof Tomasz
- Fornari Marco
- Vaqueiro Paz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 132222 |
|---|---|
| Data dodania do BaDAP | 2021-01-25 |
| Tekst źródłowy | URL |
| DOI | 10.1021/acsaem.0c02489 |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | ACS Applied Energy Materials |
Abstract
In4Se3 is an attractive n-type thermoelectric material for midrange waste heat recovery, owing to its low thermal conductivity (∼0.9 W·m- 1·K-1 at 300 K). Here, we explore the relationship between the elastic properties, thermal conductivity, and structure of In4Se3. The experimentally determined average sound velocity (2010 m·s-1), Young's modulus (47 GPa), and Debye temperature (198 K) of In4Se3 are rather low, indicating considerable lattice softening. This behavior, which is consistent with low thermal conductivity, can be related to the complex bonding found in this material, in which strong covalent In-In and In-Se bonds coexist with weaker electrostatic interactions. Phonon dispersion calculations show that Einstein-like modes occur at ≈30 cm-1. These Einstein-like modes can be ascribed to weakly bonded In+ cations located between strongly bonded [(In3)5+(Se2-)3]- layers. The Grüneisen parameter for the soft-bonded In+ at the frequencies of the Einstein-like modes is large, indicating a high degree of bond anharmonicity and hence increased phonon scattering. The calculated thermal conductivity and elastic properties are in good agreement with experimental results.
