DataVXAdvanced MaterialsPaper
journal article·2024-11

Synergistic Performance of Thermoelectric and Mechanical in Nanotwinned High‐Entropy Semiconductors AgMnGePbSbTe 5

Zheng Ma, Yubo Luo, Jinfeng Dong, Yukun Liu, Dan Zhang, Wang Li, Chengjun Li, Yingchao Wei, Qinghui Jiang, Xin Li, Huabing Yin, Vinayak P. Dravid, Qiang Zhang, Shaoping Chen, Qingyu Yan, Junyou Yang, Mercouri G. Kanatzidis

Advanced Materials· Volume 36· Issue 45
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Source abstract

Abstract

Abstract Introducing nanotwins in thermoelectric materials represents a promising approach to achieving such a synergistic combination of thermoelectric properties and mechanical properties. By increasing configurational entropy, a sharply reduced stacking fault energy in a new nanotwinned high‐entropy semiconductor AgMnGePbSbTe 5 is reached. Dense coherent nanotwin boundaries in this system provide an efficient phonon scattering barrier, leading to a high figure of merit ZT of ≈2.46 at 750 K and a high average ZT of ≈1.54 (300—823 K) with the presence of Ag 2 Te nanoprecipitate in the sample. More importantly, owing to the dislocation pinning caused by coherent nanotwin boundaries and the chemical short‐range disorder caused by the high configurational entropy effect, AgMnGePbSbTe 5 also exhibits robust mechanical properties, with flexural strength of 82 MPa and Vickers hardness of 210 H V .
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China

School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Department of Chemistry Northwestern University Evanston IL 60208 USA

Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA

College of Physics Science and Technology Hebei University Baoding 071002 P. R. China

Institute for Computational Materials Science School of Physics and Electronics Henan University Kaifeng 475004 P. R. China

College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · U.S. Department of Energy · Office of Science · Basic Energy Sciences

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