Publication detail

Ionic origin of a negative capacitance in lead halide perovskites

Alexander Kovalenko, Jan Pospisil, Oldrich Zmeskal,Josef Krajcovic,Martin Weiter

Original Title

Ionic origin of a negative capacitance in lead halide perovskites

Type

journal article in Web of Science

Language

English

Original Abstract

The origin of a negative capacitance observed in perovskite solar cells at intermediate and low frequencies remains unclear. Low trap density macroscopic single crystal MAPbBr(3) perovskites, prepared by means of an inverse temperature crystallization technique, with symmetric Au contacts is used to avoid the influence of defects and provide the information ongoing staunchly in the perovskite material. It is shown that the inductive behavior is dominant in the frequency range where capacitance possesses negative values. Accordingly, a model for the calculation of inductive elements and the description of their origin is presented. It is shown that, at high bias, there are two bias-dependent inductive elements, which corresponds to two different components of vacancy-assisted ionic diffusion in perovskite crystals, originating from Brand MA(+) ions.

Keywords

lead halide perovskite; impedance spectroscopy; ionic transport; negative capacitance

Authors

Alexander Kovalenko, Jan Pospisil, Oldrich Zmeskal,Josef Krajcovic,Martin Weiter

Released

16. 1. 2017

Publisher

Wiley

ISBN

1862-6254

Periodical

Physica Status Solidi-Rapid Research Letters

Year of study

1

Number

1

State

Federal Republic of Germany

Pages from

1

Pages to

5

Pages count

5

URL

https://onlinelibrary.wiley.com/doi/full/10.1002/pssr.201600418

BibTex

@article{BUT133551,
  author="Alexander {Kovalenko} and Jan {Pospíšil} and Oldřich {Zmeškal} and Jozef {Krajčovič} and Martin {Weiter}",
  title="Ionic origin of a negative capacitance in lead halide perovskites",
  journal="Physica Status Solidi-Rapid Research Letters",
  year="2017",
  volume="1",
  number="1",
  pages="1--5",
  doi="10.1002/pssr.201600418",
  issn="1862-6254",
  url="https://onlinelibrary.wiley.com/doi/full/10.1002/pssr.201600418"
}