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Study of thermoelectric properties of InGaN/GaN superlattice

Published online by Cambridge University Press:  03 August 2011

Hung-Hsun Huang  and
Yuh-Renn Wu
Hung-Hsun Huang
Affiliation:
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, 10617.
Yuh-Renn Wu*
Affiliation:
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, 10617.
*
*Corresponding Author. Electronic mail: yrwu@cc.ee.ntu.edu.tw
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Abstract

As many reports show that the superlattice structure could greatly enhance the figure of merit ZT value for the thermoelectric application. We studied the thermal and electrical properties of the InGaN/GaN superlattice structure, and further analyze the thermoelectric features with different superlattice period, doping concentration, and operation temperature. The elastic continuum model and Callaway model have been applied to calculate the phonon dispersion relation and the thermal conductivity, respectively. The electrical properties are obtained by the Boltzmann transport equation with the relaxation time approximation. Simulation results indicate that both the reduced thermal conductivity and enhanced power factor would have the contribution to the enhancement of the figure of merit ZT.

Keywords

thermoelectricnanostructurenitride
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1329: Symposium I – Nanoscale Heat Transfer-Thermoelectrics, Thermophotovoltaics and Emerging Thermal Devices , 2011 , mrss11-1329-i05-03
Copyright
Copyright © Materials Research Society 2011

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References

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