Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates
Source abstract
Abstract
We report the in-plane thermoelectric properties of suspended (Bi1−xSbx)2Te3 nanoplates with x ranging from 0.07 to 0.95 and thicknesses ranging from 9 to 42 nm. The results presented here reveal a trend of increasing p-type behavior with increasing antimony concentration, and a maximum Seebeck coefficient and thermoelectric figure of merit at x ∼ 0.5. We additionally tuned extrinsic doping of the surface using a tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) coating. The lattice thermal conductivity is found to be below that for undoped ultrathin Bi2Te3 nanoplates of comparable thickness and in the range of 0.2–0.7 W m−1 K−1 at room temperature.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Topological Materials and Phenomena · Thermal properties of materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
Department of Mechanical Engineering and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA
National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Funding
National Science Foundation (NSF) · Defense Advanced Research Projects Agency (DARPA) · University of Connecticut (UCONN) · U.S. Department of Energy (DOE)
References (32)
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