Miriana Vadala1,Doru Lupascu1,Andrei Karabanov1,Young Un Jin1,Niels Benson1,Kristina Winkler1,Bernd Marler2,Vladimir Shvartsman1
University of Duisburg-Essen1,Ruhr University Bochum2
Miriana Vadala1,Doru Lupascu1,Andrei Karabanov1,Young Un Jin1,Niels Benson1,Kristina Winkler1,Bernd Marler2,Vladimir Shvartsman1
University of Duisburg-Essen1,Ruhr University Bochum2
The soft nature of the crystal lattices in halide perovskites and related compounds offers a magnificent new realm of properties to these crystals. Among these is the outstandingly large dielectric constant reaching up to very high frequency values. In this contriution we will summarize the state of the art in this field and options to develop new compounds. We will revisit the charge types forming in this class of crystals, the paraleelctric and/or ferroelectric contributions. It will be displayed that ferroelectricity is a very rare effect and in most cases is just a misinterpretation of experimental data. Ways to further tune charge carrier mobility will be outlined.