Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.16: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
Time-Resolved Microwave Conductivity on Perovskite Materials for Solar Cells — •Manuel Ullrich1, Nathania Henning1, Liudmila Kudriashova1, Andreas Baumann2, Andreas Sperlich1, and Vladimir Dyakonov1,2 — 1Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — 2Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg
Perovskite solar cells have attracted much attention in recent years, since their power conversion efficiencies increased steadily and exceeded 20 %. To further improve their performance and relate this to the preparation route, optoelectronic properties need to be investigated. We use time-resolved microwave conductivity (TRMC) to elucidate and quantify charge carrier mobilities and lifetimes. This electrodeless technique is based on the interaction of photoexcited charge carriers with the applied electro-magnetic field (GHz), leading to a time-dependent change in conductance. We focus on methylammonium lead iodide (CH3NH3PbI3) as an active layer and examine different processing conditions, which affect the perovskite crystallinity and finally the charge carrier dynamics. Furthermore the impact of different transport layers on the charge carrier lifetime is investigated.