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Thermoelectric performance of ternary Cu-based chalcogenide Cu2TiTe3.
- Source :
- Applied Physics Letters; 9/11/2023, Vol. 123 Issue 11, p1-5, 5p
- Publication Year :
- 2023
-
Abstract
- In this work, we report the ternary Cu-based chalcogenide, Cu<subscript>2</subscript>TiTe<subscript>3</subscript>, as a promising thermoelectric material in middle-temperature range. The bonding interaction between Te p and Ti d states is observed in the Ti–Te octahedron, which drives the side bands up converging with Γ band, yielding a high valence band degeneracy of 5. A high electronic quality factor of 2.2 μW cm<superscript>−1</superscript> K<superscript>−2</superscript> and a decent power factor of 7.5 μW cm<superscript>−1</superscript> K<superscript>−2</superscript> at 300 K are achieved for Cu<subscript>2</subscript>TiTe<subscript>3</subscript>. Likewise, Cu<subscript>2</subscript>TiTe<subscript>3</subscript> demonstrates low lattice thermal conductivity throughout the measured temperature range, which is attributed to the low frequency vibration related to the global motion of Ti–Te–Cu clusters. Finally, a maximum figure-of-merit of 0.38 was obtained for Cu<subscript>2</subscript>TiTe<subscript>3</subscript> at 600 K. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 123
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 171987960
- Full Text :
- https://doi.org/10.1063/5.0167921