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High-performance low-cost sulfide/selenide thermoelectric devices

Tippireddy, S., Powell, A. V. and Wong, T. K. S. (2022) High-performance low-cost sulfide/selenide thermoelectric devices. In: Dalapati, G., Wong, T. S., Kundu, S., Chraborty, A. and Zhuk, S. (eds.) Sulfide and Selenide Based Materials for Emerging Applications: Sustainable Energy Harvesting and Storage Technology. Elsevier, Amsterdam, pp. 329-375. ISBN 9780323998604

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To link to this item DOI: 10.1016/B978-0-323-99860-4.00014-9


Thermoelectric (TE) materials with high figure-of-merit ZT are critical to the development of energy harvesting devices that directly convert heat to electricity. This chapter surveys recent developments in Earth-abundant high ZT metal selenides and sulfides. Key physical mechanisms leading to high ZT are discussed first including anharmonicity, band structure engineering by doping, nanoscale size effects and topological defects. The impact of synthesis and consolidation processes on the thermoelectric performance of a range of chalcogenides is described. In particular, factors including changes in stoichiometry, phase separation and precipitation arising from volatilization of the chalcogen at elevated temperatures are discussed. The significant challenges presented by devices constructed from copper chalcogenides exhibiting phonon-liquid electron-crystal (PLEC) behaviour are outlined, and strategies to ameliorate the deleterious effects of ionic diffusion in PLEC-based devices reviewed. Material synthesis, spark plasma sintering and emerging TE processing techniques such as screen-printing are described.

Item Type:Book or Report Section
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:106614

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