journal article·2024-09

Argon Plasma Bombardment Induces Surface‐Rich Sn Vacancy Defects to Enhance the Thermoelectric Performance of Polycrystalline SnSe

Chunlu Wu, Xiao‐Lei Shi, Meng Li, Zhuanghao Zheng, Liangkui Zhu, Keke Huang, Wei‐Di Liu, Pei Yuan, Lina Cheng, Zhi‐Gang Chen, Xiangdong Yao

Advanced Functional Materials· Volume 34· Issue 37
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Abstract

Abstract Nanoscale defects can induce the effective modulation of carrier concentration, mobility, and phonon scattering to secure high thermoelectric performance in semiconductors. However, it is still limited to effectively controlling nanoscale defects in thermoelectric materials. Here, argon plasma bombardment is employed to introduce a large number of point defects and dislocations in microcrystalline SnSe powders, synthesized by a solvothermal method. After sintering these powders into polycrystalline bulk materials, bulk SnSe shows the ZT increasing by up to 66.7% (from 0.36 to 0.6 at 773 K). Through detailed micro/nanostructure characterizations and first‐principles calculations, the underlying mechanism is elucidated for the evaluation of thermoelectric performance. This work provides a deep understanding of the mechanism of nanoscale defects in modulating thermoelectric performance and presents experimental evidence and experience for the design and synthesis of efficient thermoelectric materials, making significant contributions to future green energy technologies.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films

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

Affiliations

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

School of Chemistry and Physics ARC Research Hub in Zero‐emission Power Generation for Carbon Neutrality and Centre for Materials Science Queensland University of Technology Brisbane QLD 4000 Australia

Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen Guangdong 518060 P. R. China

College of Materials Science and Engineering Fuzhou University Fuzhou 350002 P. R. China

Institute of Green Chemistry and Molecular Engineering (IGCME) Sun Yat‐sen University Guangzhou Guangdong 510275 P. R. China

School of Advanced Energy and IGCME Shenzhen Campus Sun Yat‐Sen University (SYSU) Shenzhen 518100 P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China

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