Passivation by pyridine-induced PbI2 in methylammonium lead iodide perovskites

Andre Cook; Timothy W. Jones; Jacob Tse-Wei Wang; Hua Li; Rob Atkin; Noel W. Duffy; Scott W. Donne; Gregory J. Wilson

doi:10.1039/D0RA04641H

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Passivation by pyridine-induced PbI₂ in methylammonium lead iodide perovskites†

Andre Cook,

^ab Timothy W. Jones,^b Jacob Tse-Wei Wang,

^b Hua Li,^c Rob Atkin,

^c Noel W. Duffy,

^d Scott W. Donne

^a and Gregory J. Wilson

*^b

Author affiliations

* Corresponding authors

^a University of Newcastle, Callaghan, NSW 2308, Australia

^b CSIRO Energy Centre, Mayfield West, NSW 2304, Australia
E-mail: Gregory.Wilson@csiro.au

^c School of Molecular Sciences, The University of Western Australia, WA 6009, Australia

^d CSIRO Energy Clayton Laboratories, Clayton, Vic 3169, Australia

Abstract

Defects at discontinuities of the perovskite lattice limit the performance of the perovskite solar cell (PSC). Lead iodide (PbI₂) and pyridine have been shown to passivate these defects. We treat methylammonium lead iodide (MAPbI₃) films with pyridine solutions to investigate the effects of the two passivators. By comparing confocal fluorescence microscopy (CFM) images at 405 nm excitation and then at 559 nm excitation we demonstrate the pyridine treatment passivates and forms PbI₂ crystallites which cause additional passivation.

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Article information

DOI: https://doi.org/10.1039/D0RA04641H
Article type: Paper
Submitted: 26 May 2020
Accepted: 15 Jun 2020
First published: 23 Jun 2020
This article is Open Access

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RSC Adv., 2020,10, 23829-23833

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Passivation by pyridine-induced PbI₂ in methylammonium lead iodide perovskites

A. Cook, T. W. Jones, J. T. Wang, H. Li, R. Atkin, N. W. Duffy, S. W. Donne and G. J. Wilson, RSC Adv., 2020, 10, 23829 DOI: 10.1039/D0RA04641H

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