Giant electrocaloric materials energy efficiency in highly ordered lead scandium tantalate

Youri Nouchokgwe*, Pierre Lheritier, Chang Hyo Hong, Alvar Torelló, Romain Faye, Wook Jo, Christian Bahl, Emmanuel Defay

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

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Abstract

Electrocaloric materials are promising working bodies for caloric-based technologies, suggested as an efficient alternative to the vapor compression systems. However, their materials efficiency defined as the ratio of the exchangeable electrocaloric heat to the work needed to trigger this heat remains unknown. Here, we show by direct measurements of heat and electrical work that a highly ordered bulk lead scandium tantalate can exchange more than a hundred times more electrocaloric heat than the work needed to trigger it. Besides, our material exhibits a maximum adiabatic temperature change of 3.7 K at an electric field of 40 kV cm−1. These features are strong assets in favor of electrocaloric materials for future cooling devices.

Original languageEnglish
Article number3298
JournalNature Communications
Volume12
Issue number1
ISSN2041-1723
DOIs
Publication statusPublished - 2021

Bibliographical note

Funding Information:
The authors want to thank N.D. Mathur, X. Moya, and B. Nair for fruitful discussions. This study has been partly funded by Fonds National de la Recherche (FNR) Luxembourg through the projects CAMELHEAT C17/MS/11703691/Defay and MASSENA PRIDE/15/10935404/Defay-Siebentritt.

Publisher Copyright:
© 2021, The Author(s).

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