Nature Communications (Sep 2024)
Carrier-phonon decoupling in perovskite thermoelectrics via entropy engineering
- Yunpeng Zheng,
- Qinghua Zhang,
- Caijuan Shi,
- Zhifang Zhou,
- Yang Lu,
- Jian Han,
- Hetian Chen,
- Yunpeng Ma,
- Yujun Zhang,
- Changpeng Lin,
- Wei Xu,
- Weigang Ma,
- Qian Li,
- Yueyang Yang,
- Bin Wei,
- Bingbing Yang,
- Mingchu Zou,
- Wenyu Zhang,
- Chang Liu,
- Lvye Dou,
- Dongliang Yang,
- Jin-Le Lan,
- Di Yi,
- Xing Zhang,
- Lin Gu,
- Ce-Wen Nan,
- Yuan-Hua Lin
Affiliations
- Yunpeng Zheng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
- Caijuan Shi
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
- Zhifang Zhou
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Yang Lu
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University
- Jian Han
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Hetian Chen
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Yunpeng Ma
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Yujun Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
- Changpeng Lin
- Theory and Simulation of Materials (THEOS), École Polytechnique Fédérale de Lausanne
- Wei Xu
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
- Weigang Ma
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University
- Qian Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Yueyang Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Bin Wei
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Bingbing Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Mingchu Zou
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Wenyu Zhang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Chang Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Lvye Dou
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Dongliang Yang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences
- Jin-Le Lan
- State Key Laboratory of Organic-inorganic Composite, College of Materials Science and Engineering, Beijing University of Chemical Technology
- Di Yi
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Xing Zhang
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University
- Lin Gu
- National Center of Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University
- Ce-Wen Nan
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- Yuan-Hua Lin
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
- DOI
- https://doi.org/10.1038/s41467-024-52063-5
- Journal volume & issue
-
Vol. 15,
no. 1
pp. 1 – 12
Abstract
Abstract Thermoelectrics converting heat and electricity directly attract broad attentions. To enhance the thermoelectric figure of merit, zT, one of the key points is to decouple the carrier-phonon transport. Here, we propose an entropy engineering strategy to realize the carrier-phonon decoupling in the typical SrTiO3-based perovskite thermoelectrics. By high-entropy design, the lattice thermal conductivity could be reduced nearly to the amorphous limit, 1.25 W m−1 K−1. Simultaneously, entropy engineering can tune the Ti displacement, improving the weighted mobility to 65 cm2 V−1 s−1. Such carrier-phonon decoupling behaviors enable the greatly enhanced μ W/κ L of ~5.2 × 103 cm3 K J−1 V−1. The measured maximum zT of 0.24 at 488 K and the estimated zT of ~0.8 at 1173 K in (Sr0.2Ba0.2Ca0.2Pb0.2La0.2)TiO3 film are among the best of n-type thermoelectric oxides. These results reveal that the entropy engineering may be a promising strategy to decouple the carrier-phonon transport and achieve higher zT in thermoelectrics.
