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Materials 2017, 10(3), 309;

ZT Optimization: An Application Focus

European Thermodynamics Ltd., 8 Priory Business Park, Wistow, Leicester LE8 0RX, UK
Author to whom correspondence should be addressed.
Academic Editor: Paz Vaqueiro
Received: 3 February 2017 / Revised: 5 March 2017 / Accepted: 14 March 2017 / Published: 17 March 2017
(This article belongs to the Special Issue Advances in Thermoelectric Materials)
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Significant research has been performed on the challenge of improving thermoelectric materials, with maximum peak figure of merit, ZT, the most common target. We use an approximate thermoelectric material model, matched to real materials, to demonstrate that when an application is known, average ZT is a significantly better optimization target. We quantify this difference with some examples, with one scenario showing that changing the doping to increase peak ZT by 19% can lead to a performance drop of 16%. The importance of average ZT means that the temperature at which the ZT peak occurs should be given similar weight to the value of the peak. An ideal material for an application operates across the maximum peak ZT, otherwise maximum performance occurs when the peak value is reduced in order to improve the peak position. View Full-Text
Keywords: thermoelectric; application; simulation; average ZT; optimization thermoelectric; application; simulation; average ZT; optimization

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Tuley, R.; Simpson, K. ZT Optimization: An Application Focus. Materials 2017, 10, 309.

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