11th February 2021 – Talk 3:

CeraLinkTM: An Antiferroelectric Capacitor for Power Electronics

Dr. Thorsten Bayer TDK Electronics Corporate Research & Development, Material Development, Piezo and Protection Devices

Proceeding electrification including automotive power electronics demands increased power density, miniaturization, and elevated operating temperatures. One crucial component to define the cost, size, energy efficiency, and reliability of power electronics is the DC link capacitor. For this purpose, CeraLinkTM capacitors are perfectly suited due to their high capacitance density, high operating temperatures, low inductance, as well as low losses in operation. CeraLinkTM is based on the ceramic material PLZT (lead lanthanum zirconate titanate) and characterized by a high energy storage capability due to the antiferroelectric phase. This presentation provides an overview of material and device requirements. Optimization capabilities as well as constraints will be outlined to further advance the capacitor technology based on antiferroelectric materials. Especially, methods to study the process of resistance degradation are addressed to continuously improve the overall reliability as well as the predictability of the device life time.

Thorsten Bayer works as a Development Engineer at TDK Electronics in Austria. He studied Materials Science from 2004 – 2009 at TU Darmstadt and completed his dissertation Impact of injected charge carriers on Ba0,6Sr0,4TiO3 thin films: Electric and dielectric characterization and simulation of the charge transport in 2014 at TU Darmstadt’s Surface Science Division. From 2014 – 2017, he worked as a Postdoc at the Pennsylvania State University on The Role of Interfaces in Performance, Degradation, and Breakdown of NonLinear Dielectrics Under Extreme Conditions (AFOSR funded project).

  • Determination of Electrical Properties of Degraded Mixed Ionic Conductors: Impedance Studies with Applied dc Voltage, T.J.M. Bayer , JJ Carter, JJ Wang, A Klein, LQ Chen, CA Randall, Journal of Applied Physics 122 (24), 244101
  • The Relation of Electrical Conductivity Profiles and Modulus Data Using the Example of STO:Fe Single Crystals: A Path to Improve the Model of Resistance Degradation, T.J.M. Bayer, et. al., Acta Mater. 117, 252-261, 2016

About the FLAME-inars

The FLAME-inars are organized by the collaborative project FLAME at TU Darmstadt, in which electronic-structure-property relationships are being developed and exploited to realize novel lead-free antiferroelectric compounds. The seminars will gather experts in processing, characterization and theory to discuss materials and applications, bulk and thin films, fundamental properties, electronic structure & defects, and related aspects.