Pavonite Homologous CdAg<sub>2.5</sub>Sb<sub>6.5</sub>Se<sub>12</sub> as a Promising Thermoelectric Compound
Pavonite compounds with complex and disordered structures are promising thermoelectric materials due to their extremely low lattice thermal conductivity. Herein, we report the pavonite compound CdAg2.5Sb6.5Se12 with an extremely low lattice thermal conductivity of 0.36 W m–1 K–1 at 773 K. Because of the poor electrical properties, we adjust the ratio of Ag and Cd to populate a large quantity of carriers, thus increasing the carrier concentration. Based on the single parabolic band model, the density of state effective mass increases from 0.3 me in the pristine sample to 1.3 me in the doped one (me is the electron mass) because of the increase in the valence band degeneracy. Ultimately, the extremely low thermal conductivity combined with the enhanced electrical performance results in enhanced ZT ∼ 0.35 at 672 K compared with the pristine sample of ∼0.02.
Authors
- Gangjian Tan (ORCID: https://orcid.org/0000-0002-9087-4048)
- Xinfeng Tang (ORCID: https://orcid.org/0000-0002-0715-5529)
- Yicheng Wang (ORCID: https://orcid.org/0000-0002-9583-5347)
- Chenghao Xie
- Rongcheng Li
- Zhengjie Liu (ORCID: https://orcid.org/0000-0003-2847-2109)
- Bowen Jin (ORCID: https://orcid.org/0000-0002-9958-5824)
- Chengyun Liao
Institutions
- Wuhan University of Technology (CN)
- Division of Materials Science and Engineering (AU)
- State Key Laboratory of Advanced Technology For Materials Synthesis and Processing
Publication Details
- Journal
- ACS Applied Energy Materials
- Published
- 2025-02-26
- DOI
- https://doi.org/10.1021/acsaem.5c00017
- Citations
- 1
- Primary Topic
- Advanced Thermoelectric Materials and Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- National Natural Science Foundation of China