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Transport property analysis method for thermoelectric materials: material quality factor and the effective mass model

Kang, Stephen Dongmin and Snyder, G. Jeffrey (2017) Transport property analysis method for thermoelectric materials: material quality factor and the effective mass model. . (Submitted) http://resolver.caltech.edu/CaltechAUTHORS:20180410-085504304

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Abstract

Thermoelectric semiconducting materials are often evaluated by their figure-of-merit, zT. However, by using zT as the metric for showing improvements, it is not immediately clear whether the improvement is from an enhancement of the inherent material property or from optimization of the carrier concentration. Here, we review the quality factor approach which allows one to separate these two contributions even without Hall measurements. We introduce practical methods that can be used without numerical integration. We discuss the underlying effective mass model behind this method and show how it can be further advanced to study complex band structures using the Seebeck effective mass. We thereby dispel the common misconception that the usefulness of effective band models is limited to single parabolic band materials.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
https://arxiv.org/abs/1710.06896arXivDiscussion Paper
ORCID:
AuthorORCID
Kang, Stephen Dongmin0000-0002-7491-7933
Snyder, G. Jeffrey0000-0003-1414-8682
Record Number:CaltechAUTHORS:20180410-085504304
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180410-085504304
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85715
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Apr 2018 16:08
Last Modified:10 Apr 2018 16:08

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