Publication detail

Coordination Chemistry Dictates the Structural Defects in Lead Halide Perovskites

Sara Rahimnejad, Alexander Kovalenko, Sergio Martí Forés, Clara Aranda, Antonio Guerrero

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

We show the influence of species present in precursor solution during formation of lead halide perovskite materials on the structural defects of the films. The coordination of lead by competing solvent molecules and iodide ions will dictate the type of complexes present in the films. Depending on the processing conditions all PbIS₅+, PbI₂S₄, PbI₃S₃¯, PbI₄S₂²¯, PbI₅S₁³¯, PbI₆⁴¯and 1-D (Pb₂I₄)n chains are observed by absorption measurements. Different parameters are studied like polarity of the solvent, concentration of iodide ions, concentration of solvent molecules and temperature. It is concluded that strongly coordinating solvents will preferentially form species with a low number of iodide ions and less coordinative solvents generate high concentration of PbI6-. We furthermore propose that all these plumbate ions may act as structural defects determining electronic properties of the photovoltaic films.

Keywords

perovskite, crystallization, solar cells

Authors

Sara Rahimnejad, Alexander Kovalenko, Sergio Martí Forés, Clara Aranda, Antonio Guerrero

Released

12. 7. 2016

Publisher

Wiley

Location

USA

ISBN

1439-4235

Periodical

CHEMPHYSCHEM

Year of study

Number

State

Federal Republic of Germany

Pages from

2795

Pages to

2798

Pages count

URL

http://onlinelibrary.wiley.com/doi/10.1002/cphc.201600575/abstract

BibTex

@article{BUT129002,
  author="Alexander {Kovalenko}",
  title="Coordination Chemistry Dictates the Structural Defects in Lead Halide Perovskites",
  journal="CHEMPHYSCHEM",
  year="2016",
  volume="17",
  number="18",
  pages="2795--2798",
  doi="10.1002/cphc.201600575",
  issn="1439-4235",
  url="http://onlinelibrary.wiley.com/doi/10.1002/cphc.201600575/abstract"
}