Accession Number : AD1016744

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

Descriptive Note : Journal Article

Corporate Author : University of Texas at Austin Austin United States

Personal Author(s) : Pettes,Michael T ; Kim,Jaehyun ; Wu,Wei ; Bustillo,Karen C ; Shi,Li

Full Text :

Report Date : 25 Jul 2016

Pagination or Media Count : 9

Abstract : 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.

Descriptors :   Antimony , Bismuth tellurides , thermal conductivity , doping , transmission electron microscopy , electron microscopes , transport properties , fermi levels , chemical vapor deposition , synthesis (chemistry) , substrates , surface properties , nanostructures

Distribution Statement : APPROVED FOR PUBLIC RELEASE