Lattice plainification and band engineering lead to high thermoelectric cooling and power generation in n-type Bi2Te3 with mass production
Thermoelectrics can mutually convert between thermal and electrical energy, ensuring its utilization in both power generation and solid-state cooling. Bi<sub>2</sub>Te<sub>3</sub> exhibits promising room-temperature performance, making it the sole commercially available thermoelectrics to date. Guided by the lattice plainification strategy, we introduce trace amounts of Cu into n-type Bi<sub>2</sub>(Te, Se)<sub>3</sub> (BTS) to occupy Bi vacancies, thereby simultaneously weakening defect scattering and modulating the electronic bands. Meanwhile, the interstitial Cu can bond with the BTS matrix to form extra electron transport pathways. The multiple occupations of Cu substantially boost carrier mobility and electrical performance. Consequently, the BTS + 0.2%Cu achieves a room-temperature <i>ZT</i> of ∼1.3 with an average <i>ZT</i> <sub>ave</sub> of ∼1.2 at 300-523 K. Moreover, the kilogram-scale ingot designed for mass production also exhibits high uniformity. Finally, we fabricate a full-scale device that achieves an excellent conversion efficiency of ∼6.4% and a high cooling Δ<i>T</i> <sub>max</sub> of ∼70.1 K, both of which outperform commercial devices.
Authors
- Dongrui Liu (ORCID: https://orcid.org/0000-0003-4577-6526)
- Li‐Dong Zhao (ORCID: https://orcid.org/0000-0003-1247-4345)
- Yongxin Qin (ORCID: https://orcid.org/0000-0002-1699-1369)
- Huaping Liang (ORCID: https://orcid.org/0000-0003-4157-445X)
- Yi Wen (ORCID: https://orcid.org/0000-0001-8634-1655)
- Zhihai Ding
- Tao Hong (ORCID: https://orcid.org/0000-0001-8349-7793)
- Xin Qian (ORCID: https://orcid.org/0000-0001-7016-0147)
- Xiang Gao (ORCID: https://orcid.org/0000-0002-7496-158X)
- Jiayi Peng (ORCID: https://orcid.org/0009-0007-4628-3324)
- Dongyang Wang (ORCID: https://orcid.org/0000-0001-8149-7394)
- Yichen Li (ORCID: https://orcid.org/0009-0008-7403-009X)
- Qian Cao
- Shulin Bai (ORCID: https://orcid.org/0009-0008-1747-7610)
- Qing Tan (ORCID: https://orcid.org/0000-0003-3167-7674)
- Shibo Liu (ORCID: https://orcid.org/0009-0003-0307-817X)
- Haonan Shi (ORCID: https://orcid.org/0000-0003-4975-843X)
- Lizhong Su
- Bingchao Qin (ORCID: https://orcid.org/0000-0003-2720-5922)
Institutions
- Zhejiang International Studies University (CN)
- Zhengzhou University (CN)
- Division of Materials Science and Engineering (AU)
- Center for High Pressure Science and Technology Advanced Research (CN)
- The Medical Device (United Kingdom) (GB)
- The First People's Hospital of Xiaoshan District, Hangzhou (CN)
- Hebei University (CN)
- Taiyuan University of Science and Technology (CN)
- Beihang University (CN)
Publication Details
- Journal
- National Science Review
- Published
- 2024-12-06
- DOI
- https://doi.org/10.1093/nsr/nwae448
- Citations
- 37
- Primary Topic
- Advanced Thermoelectric Materials and Devices
- Type
- article
- Field-Weighted Citation Impact
- 4.33
Funders
- Tencent
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Higher Education Discipline Innovation Project
- Beijing Municipal Natural Science Foundation
- National Postdoctoral Program for Innovative Talents
- National Key Research and Development Program of China
- Overseas Expertise Introduction Project for Discipline Innovation
- National Science Fund for Distinguished Young Scholars