Emmanuel Defay

E Defay - v2

Research Interest

My research interest is mostly on piezoelectric thin films and devices. I am interested in inkjet printing technique to deposit standard piezoelectric films such as Pb(Zr,Ti)O3 (PZT) and also lead-free materials such as (Ba,Ca)TiO3 in order to fabricate functional devices as micro-sensors or actuators. I am also very much interested in the electrocaloric (EC) effect occurring in ceramics and polymers, which triggers a variation of temperature in any EC material when a voltage is applied. More generally, I am interested in developing materials exhibiting energy coupling.


Emmanuel has been leading the Ferroic Materials for Transducers group for the last four years at LIST. Prior to that, he spent 15 years with CEA LETI in Grenoble to develop piezoelectric thin films for Microsystems. From 2010 to 2012, he was an invited scholar at the University of Cambridge (UK) and by-Fellow of Churchill College, where he performed research on the electrocaloric effect for solid-state cooling. Emmanuel graduated from the National Engineering School in Mechanics and Microtechnology (ENSMM) Besançon in 1994. He obtained his PhD in Physics from INSA Lyon in 1999, the French “habilitation” (HDR) from the University of Grenoble in 2007. He published 120 papers, filed 32 patents, wrote 2 books and obtained 25 invited talks.

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