Structural Modularization of Cu2Te Leading to High Thermoelectric Performance near the Mott–Ioffe–Regel Limit
Source abstract
Abstract
Abstract To date, thermoelectric materials research stays focused on optimizing the material's band edge details and disfavors low mobility. Here, the paradigm is shifted from the band edge to the mobility edge, exploring high thermoelectricity near the border of band conduction and hopping. Through coalloying iodine and sulfur, the plain crystal structure is modularized of liquid‐like thermoelectric material Cu2Te with mosaic nanograins and the highly size mismatched S/Te sublattice that chemically quenches the Cu sublattice and drives the electronic states from itinerant to localized. A state‐of‐the‐art figure of merit of 1.4 is obtained at 850 K for Cu2(S0.4I0.1Te0.5); and remarkably, it is achieved near the Mott–Ioffe–Regel limit unlike mainstream thermoelectric materials that are band conductors. Broadly, pairing structural modularization with the high performance near the Mott–Ioffe–Regel limit paves an important new path towards the rational design of high‐performance thermoelectric materials.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
Wuzhen Laboratory Tongxiang 314500 China
State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China
State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro‐System and Information Technology Chinese Academy of Sciences Shanghai 200050 China
College of Chemistry and Chemical Engineering Central South University Changsha 410083 China
China Spallation Neutron Source Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China
Department of Physics and Astronomy Clemson University Clemson SC 29634‐0978 USA
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China
References (70)
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