ECI Digital Archives

Title

Iodide-ion transport in methylammonium lead iodide perovskite: Some surprising aspects

Authors

Roger A. De Souza, RWTH Aachen University, Institute of Physical Chemistry, GermanyFollow
Denis Barboni, Institute of Physical Chemistry, RWTH Aachen University
Dennis Kemp, Institute of Physical Chemistry, RWTH Aachen University

Conference Dates

March 10-14, 2019

Abstract

Methylammonium lead iodide, CH₃NH₃PbI₃ (= MAPbI₃), is a hybrid organic–inorganic perovskite that exhibits excellent photovoltaic properties. In comparison with traditional photovoltaic materials, such as Si or CIGS, MAPbI₃ is evidently characterised by one or more highly mobile constituent ions. In photovoltaic devices based on MAPbI₃, ion mobility is deemed to be responsible for current–voltage hysteresis, a huge low-frequency dielectric response, and long-term instability. Despite enormous interest in ion transport, debate surrounds almost every aspect. This is evident in the excessive scatter in activation enthalpies reported in the literature for ion conduction in MAPbI₃ (see Fig. 1).

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Recommended Citation

Roger A. De Souza, Denis Barboni, and Dennis Kemp, "Iodide-ion transport in methylammonium lead iodide perovskite: Some surprising aspects" in "Nonstoichiometric Compounds VII", ECI Symposium Series, (2019). https://dc.engconfintl.org/nonstoichiometric_vii/46