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

Journal Article · · APL Materials
DOI:https://doi.org/10.1063/1.4955400· OSTI ID:1272641

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. As a result, 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.

Research Organization:
Univ. of Connecticut, Storrs, CT (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1272641
Alternate ID(s):
OSTI ID: 1329710; OSTI ID: 1420529
Journal Information:
APL Materials, Journal Name: APL Materials Vol. 4 Journal Issue: 10; ISSN 2166-532X
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Enhanced thermoelectric efficiency in topological insulator Bi 2 Te 3 nanoplates via atomic layer deposition-based surface passivation journal August 2018
Contributions to composite conductivity and Seebeck coefficient in commercial Bi 2 Te 3 —Conjugated polymer composites journal March 2019
A Review of Thermal Transport in Low-Dimensional Materials Under External Perturbation: Effect of Strain, Substrate, and Clustering journal January 2017
Nanoscale self-assembly of thermoelectric materials: a review of chemistry-based approaches journal August 2018