Intrinsically low thermal conductivity from a quasi-one-dimensional crystal structure and enhanced electrical conductivity network via Pb doping in SbCrSe<sub>3</sub> [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers e387 : digital, PDF file
- Additional Creators:
- United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- The development of new routes for the production of thermoelectric materials with low-cost and high-performance characteristics has been one of the long-term strategies for saving and harvesting thermal energy. We report a new approach for improving thermoelectric properties by employing the intrinsically low thermal conductivity of a quasi-one-dimensional (quasi-1D) crystal structure and optimizing the power factor with aliovalent ion doping. As an example, we demonstrated that SbCrSe<sub>3</sub>, in which two parallel chains of CrSe<sub>6</sub> octahedra are linked by antimony atoms, possesses a quasi-1D property that resulted in an ultra-low thermal conductivity of 0.56 W m<sup>-1</sup> K<sup>-1</sup> at 900 K. After maximizing the power factor by Pb doping, the peak ZT value of the optimized Pb-doped sample reached 0.46 at 900 K, which is an enhancement of 24 times that of the parent SbCrSe<sub>3</sub> structure. The mechanisms that lead to low thermal conductivity derive from anharmonic phonons with the presence of the lone-pair electrons of Sb atoms and weak bonds between the CrSe<sub>6</sub> double chains. Our results shed new light on the design of new and high-performance thermoelectric materials.
- Published through SciTech Connect.
NPG Asia Materials (Online) 9 6 ISSN 1884-4057 AM
Dingfeng Yang; Wei Yao; Yanci Yan; Wujie Qiu; Lijie Guo; Xu Lu; Ctirad Uher; Xiaodong Han; Guoyu Wang; Tao Yang; Xiaoyuan Zhou.
Univ. of Michigan, Ann Arbor, MI (United States)
- Funding Information:
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