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Title: Enhancing the thermoelectric figure of merit through the reduction of bipolar thermal conductivity with heterostructure barriers

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4892653· OSTI ID:1384265
 [1];  [1]
  1. Purdue Univ., West Lafayette, IN (United States)

In this paper, we present theoretically that the thermoelectric figure of merit for a semiconductor material with a small band gap can be significantly enhanced near the intrinsic doping regime at high temperatures via the suppression of bipolar thermal conductivity when the minority carriers are selectively blocked by heterostructure barriers. This scheme is particularly effective in nanostructured materials where the lattice thermal conductivity is lowered by increased phonon scatterings at the boundaries, so that the electronic thermal conductivity including the bipolar term is limiting the figure of merit $zT$. We show that $zT$ can be enhanced to above 3 for p-type PbTe, and above 2 for n-type PbTe at 900 K with minority carrier blocking, when the lattice thermal conductivity is as low as 0.3 W/m K.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Energy Efficient Materials (CEEM)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001009
OSTI ID:
1384265
Journal Information:
Applied Physics Letters, Vol. 105, Issue 5; Related Information: CEEM partners with the University of California, Santa Barbara (lead); Purdue University; Los Alamos National Laboratory; National Renewable Energy Laboratory; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 86 works
Citation information provided by
Web of Science

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Enhancing Thermoelectric Properties of Higher Manganese Silicide (HMS) by Partial Ta Substitution journal October 2019
Attaining high mid-temperature performance in (Bi,Sb)2Te3 thermoelectric materials via synergistic optimization journal September 2016
Thermoelectric and phonon transport properties of two-dimensional IV–VI compounds journal March 2017
Conductivity-limiting bipolar thermal conductivity in semiconductors journal May 2015
PAW-mediated ab initio simulations on linear response phonon dynamics of anisotropic black phosphorous monolayer for thermoelectric applications journal January 2018
Synergistically optimizing interdependent thermoelectric parameters of n-type PbSe through alloying CdSe journal January 2019
Enhanced thermoelectric performance of Bi–Sb–Te/Sb 2 O 3 nanocomposites by energy filtering effect journal January 2018
First-principles study of thermal transport properties in the two- and three-dimensional forms of Bi 2 O 2 Se journal January 2019
Monolayer SnP 3 : an excellent p-type thermoelectric material journal January 2019
Band gap estimation from temperature dependent Seebeck measurement—Deviations from the 2e|S|maxTmax relation journal January 2015
The influence of non-idealities on the thermoelectric power factor of nanostructured superlattices journal December 2015
On the effectiveness of the thermoelectric energy filtering mechanism in low-dimensional superlattices and nano-composites journal December 2016
An experimental study of a-Si/ZnO-stacked hetero-structures for potential thermoelectric energy harvesting applications journal October 2018
Enhanced thermoelectric properties through minority carriers blocking in nanocomposites journal September 2019
Evaluating Broader Impacts of Nanoscale Thermal Transport Research journal April 2015
The influence of non-idealities on the thermoelectric power factor of nanostructured superlattices text January 2015
PAW mediated ab initio simulations on linear response phonon dynamics of anisotropic black phosphorous monolayer for thermoelectric applications text January 2018