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Seebeck Tensor Analysis of (p × n)-type Transverse Thermoelectric Materials

Published online by Cambridge University Press:  11 March 2019

Qing Shao ,
Arun Mannodi Kanakkithodi ,
Yi Xia ,
Maria K.Y. Chan  and
Matthew Grayson
Qing Shao*
Affiliation:
Electrical Engineering and Computer Science, Northwestern University, Evanston, IL60208
Arun Mannodi Kanakkithodi
Affiliation:
Center for Nanoscale Materials, Argonne National Lab, Lemont IL 60439
Yi Xia
Affiliation:
Center for Nanoscale Materials, Argonne National Lab, Lemont IL 60439
Maria K.Y. Chan
Affiliation:
Center for Nanoscale Materials, Argonne National Lab, Lemont IL 60439
Matthew Grayson
Affiliation:
Electrical Engineering and Computer Science, Northwestern University, Evanston, IL60208 Applied Physics Program, Northwestern University, Evanston IL 60208
*
*(Email: qingshao2017@u.northwestern.edu)
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Abstract

Single-leg (p × n)-type transverse thermoelectrics (TTE) are reviewed as an alternative to conventional or “longitudinal” double-leg thermoelectrics for applications at room temperature and below. As the name suggests, this unique behavior of (p × n)-type transverse thermoelectrics results from choosing ambipolar anisotropic materials that have a Seebeck tensor with orthogonal p- and n-type Seebeck coefficients, leading to transverse relation between net heat and net electrical current. One feature of such materials is that they can operate near intrinsic doping and, therefore will not suffer from dopant freeze-out, opening the possibility of new cryogenic operation for solid state cooling. In this work, a Seebeck tensor analysis of thermoelectric materials is presented. To compare the performance of transverse thermoelectric materials, a transverse power factor PF⊥ is introduced. Materials searches based on these simple criteria reveal that over 1/4 of the database of about 48,000 inorganic materials could potentially function as (p × n)-type TTE’s, demonstrating the underappreciated prevalence of this class of materials.

Keywords

modelingthermoelectric
Type
Articles
Information
MRS Advances , Volume 4 , Issue 8: Thermal Properties and Thermoelectric Materials , 2019 , pp. 491 - 497
Copyright
Copyright © Materials Research Society 2019 

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References

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