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Talk by Moritz Futscher (EMPA) for the NGSE PhD-Postdoc series on 0ctober 27th 2021

Abstract:
Halide perovskites have proven to be a promising candidate for high-efficiency solar cells, light-emitting diodes, and X-ray detectors, overcoming limitations of inorganic semiconductors. However, unlike classical inorganic semiconductors, halide perovskites are mixed ionic-electronic conductors, and their ionic conductivity has been shown to increase under device operating conditions. In this talk, I will discuss the important consequences of this mixed conductivity for (opto)electronic measurement techniques. I will further show how to distinguish between ionic and electronic effects using transient techniques, and highlight some recent developments to utilize the mixed conductivity of halide perovskites in applications such as Li-ion batteries and resistive switches.