Thermoelectric transport in surface- and antimony-doped bismuth telluride nanoplates
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
Cited by: 44 works
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