Ionic conductivity of organic-inorganic perovskites: Relevance for long-time and low frequency behavior

Abstract

This chapter is focused on the relevance of the ionic transport in hybrid organic-inorganic perovskites. The occurrence of significant ionic conductivity along with electronic conductivity leads to stoichiometric polarization on current flow. Such a polarization yields a large apparent dielectric constant at low frequencies and a pronounced hysteresis behavior in i-V sweep experiments. We describe electrochemical background, precise measurements, and the impact of these phenomena for the photo-perovskites.