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Thermoelectric Transport in Surface- and Antimony-Doped Bismuth Telluride Nanoplates

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University of Texas at Austin Austin United States

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We report the in-plane thermoelectric properties of suspended Bi1xSbx 2Te3nanoplates with x ranging from 0.07 to 0.95 and thicknesses ranging from 9 to42 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 0.20.7 W m1 K1at room temperature.

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Journal Article

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APL Materials , 4, 10, 01 Jan 0001, 01 Jan 0001, Open Access: Publishers Version. May be placed on public websites; Creative Commons Attribution (CC BY) license (



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Approved For Public Release;

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