Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates

Michael Thompson Pettes; Jaehyun Kim; Wei Wu; Karen C. Bustillo; Li Shi

doi:10.1063/1.4955400

Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates

Michael Thompson Pettes
, Jaehyun Kim
, Wei Wu
, Karen C. Bustillo
, Li Shi

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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.

Original language	English
Article number	104810
Journal	APL Materials
Volume	4
Issue number	10
DOIs	https://doi.org/10.1063/1.4955400
State	Published - Oct 1 2016
Externally published	Yes

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title = "Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates",

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.",

author = "Pettes, \{Michael Thompson\} and Jaehyun Kim and Wei Wu and Bustillo, \{Karen C.\} and Li Shi",

year = "2016",

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T1 - Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates

AU - Pettes, Michael Thompson

AU - Kim, Jaehyun

AU - Wu, Wei

AU - Bustillo, Karen C.

AU - Shi, Li

PY - 2016/10/1

Y1 - 2016/10/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84979944356

U2 - 10.1063/1.4955400

DO - 10.1063/1.4955400

M3 - Article

VL - 4

JO - APL Materials

JF - APL Materials

IS - 10

M1 - 104810

ER -

Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates

Abstract

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