Temperature Dependent Charge Carrier Dynamics in Formamidinium Lead Iodide Perovskite

María C. Gélvez-Rueda, Nicolas Renaud, Ferdinand C. Grozema*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

37 Citations (Scopus)
112 Downloads (Pure)

Abstract

The fundamental opto-electronic properties of organic-inorganic hybrid perovskites are strongly affected by their structural parameters. These parameters are particularly critical in formamidinium lead iodide (FAPbI3), in which its large structural disorder leads to a non-perovskite yellow phase that hinders its photovoltaic performance. A clear understanding of how the structural parameters affect the opto-electronic properties is currently lacking. We have studied the opto-electronic properties of FAPbI3 using microwave conductivity measurements. We find that the mobility of FAPbI3 increases at low temperature following a phonon scattering behavior. Unlike methylammonium lead iodide (MAPbI3), there are no abrupt changes after the low-temperature β/γ phase transition and the lifetime is remarkably long. This absence of abrupt changes can be understood in terms of the reduced rotational freedom and smaller dipole moment of the formamidinium, as compared to methylammonium.

Original languageEnglish
Pages (from-to)23392-23397
Number of pages6
JournalThe Journal of Physical Chemistry C
Volume121
Issue number42
DOIs
Publication statusPublished - 26 Oct 2017

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