Enhanced Thermoelectric Performance in High Entropy Alloys Sn0.25Pb0.25Mn0.25Ge0.25Te
Source abstract
Abstract
Entropy is a physical quantity gauging the degree of chaos in the system. High entropy alloying is thus an effective strategy to reduce the lattice thermal conductivity of the thermoelectric materials. In this paper, PbTe, GeTe, and MnTe are coalloyed with SnTe to form a single-phase solid solution. Because of the inclusion of various elements at the cationic (Sn2+) site, the configurational entropy increases, and the phonon scattering is strongly enhanced, leading to a reduced lattice thermal conductivity. In addition, the Seebeck coefficient is improved because of the band modification via this coalloying. Ga is then further doped to optimize the carrier concentration to ∼5.7 × 1020 cm–3 and reduce the room-temperature lattice thermal conductivity to ∼0.6 W m–1 K–1. Finally, a high peak ZT value of ∼1.52 at 823 K and an average ZT value ∼1.0 from 323 to 823 K were obtained in Ga0.025(Sn0.25Pb0.25Mn0.25Ge0.25)0.975Te.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, P.R. China
Ningbo Fengcheng Advanced Energy Materials Research Institute, Fenghua District, Ningbo, Zhejiang 315500, China
School of Science, Harbin Institute of Technology, Shenzhen 518055, P.R. China
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, P.R. China
Blockchain Development and Research Institute, Harbin Institute of Technology, Shenzhen 518055, P.R. China
Funding
Zhejiang University · Science, Technology and Innovation Commission of Shenzhen Municipality · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province · Fund of Science and Technology on Reactor Fuel and Materials Laboratory · Key Project of Shenzhen Fundamental Research Projects
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