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Wu Y, Chen Y, Fang Z, Ding Y, Li Q, Xue K, Shao H, Zhang H, Zhou L. Ultralow Lattice Thermal Transport and Considerable Wave-like Phonon Tunneling in Chalcogenide Perovskite BaZrS 3. J Phys Chem Lett 2023; 14:11465-11473. [PMID: 38085873 DOI: 10.1021/acs.jpclett.3c02940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Chalcogenide perovskites provide a promising avenue for nontoxic, stable thermoelectric materials. Here, the thermal transport and thermoelectric properties of BaZrS3 as a typical orthorhombic perovskite are investigated. An extremely low lattice thermal conductivity κL of 1.84 W/mK at 300 K is revealed for BaZrS3, due to the softening effect of Ba atoms on the lattice and the strong anharmonicity caused by the twisted structure. We demonstrate that coherence contributions to κL, arising from wave-like phonon tunneling, lead to an 18% thermal transport contribution at 300 K. The increasing temperature softens the phonons, thus reducing the group velocity of materials and increasing the scattering phase space. However, it simultaneously reduces the anharmonicity, which is dominant in BaZrS3 and ultimately improves the particle-like thermal transport. In addition, via replacement of the S atom with Se- and Ti-alloying strategy, the ZT value of BaZrS3 is significantly increased from 0.58 to 0.91 at 500 K, making it an important candidate for thermoelectric applications.
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Affiliation(s)
- Yu Wu
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Ying Chen
- School of Information Science and Technology, Fudan University, Shanghai 200433, China
| | - Zhenxing Fang
- School of Physics and Electronic Science, Zunyi Normal University, Zunyi 563006, Guizhou, China
| | - Yimin Ding
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Qiaoqiao Li
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Kui Xue
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Hezhu Shao
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou 325035, China
| | - Hao Zhang
- School of Information Science and Technology, Fudan University, Shanghai 200433, China
- Yiwu Research Institute of Fudan University, Chengbei Road, Yiwu City, Zhejiang 322000, China
| | - Liujiang Zhou
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
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