Publication detail

Interface inductive currents and carrier injection in hybrid perovskite single crystals

Alexander Kovalenko, Jan Pospisil Jozef Krajcovic Martin Weiter Antonio Guerrero, Germa Garcia-Belmonte

Original Title

Interface inductive currents and carrier injection in hybrid perovskite single crystals

English Title

Interface inductive currents and carrier injection in hybrid perovskite single crystals

Type

journal article in Web of Science

Language

en

Original Abstract

Interfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, along with the asymmetrical architecture of any solar cell, makes the interpretation of electrical measurements always inconclusive. A strategy to progress in relating electric responses, operating mechanisms, and device architecture relies upon simplifying the probing structure. Macroscopic CH3NH3PbBr3 single crystals with symmetrical contacts are tested by means of long-time current transient and impedance spectroscopy. It is observed that interfaces govern carrier injection to (and extraction from) perovskite layers through an inductive (negative capacitance) mechanism with a response time in the range of similar to 1-100 s under dark conditions and inert atmosphere. Current transient exhibits a slow recovering after the occurrence of an undershoot, signaling a complex carrier dynamics which involves changes in surface state occupancy. Published by AIP Publishing.

English abstract

Interfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, along with the asymmetrical architecture of any solar cell, makes the interpretation of electrical measurements always inconclusive. A strategy to progress in relating electric responses, operating mechanisms, and device architecture relies upon simplifying the probing structure. Macroscopic CH3NH3PbBr3 single crystals with symmetrical contacts are tested by means of long-time current transient and impedance spectroscopy. It is observed that interfaces govern carrier injection to (and extraction from) perovskite layers through an inductive (negative capacitance) mechanism with a response time in the range of similar to 1-100 s under dark conditions and inert atmosphere. Current transient exhibits a slow recovering after the occurrence of an undershoot, signaling a complex carrier dynamics which involves changes in surface state occupancy. Published by AIP Publishing.

Keywords

perovskite single crystal, inductace, impedance spectroscopy

Released

23.10.2017

Publisher

AIP

Location

USA

Pages from

1

Pages to

4

Pages count

4

URL

Documents

BibTex


@article{BUT141050,
  author="Alexander {Kovalenko} and Jan {Pospíšil} and Jozef {Krajčovič} and Martin {Weiter}",
  title="Interface inductive currents and carrier injection in hybrid perovskite single crystals",
  annote="Interfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, along with the asymmetrical architecture of any solar cell, makes the interpretation of electrical measurements always inconclusive. A strategy to progress in relating electric responses, operating mechanisms, and device architecture relies upon simplifying the probing structure. Macroscopic CH3NH3PbBr3 single crystals with symmetrical contacts are tested by means of long-time current transient and impedance spectroscopy. It is observed that interfaces govern carrier injection to (and extraction from) perovskite layers through an inductive (negative capacitance) mechanism with a response time in the range of similar to 1-100 s under dark conditions and inert atmosphere. Current transient exhibits a slow recovering after the occurrence of an undershoot, signaling a complex carrier dynamics which involves changes in surface state occupancy. Published by AIP Publishing.",
  address="AIP",
  chapter="141050",
  doi="10.1063/1.4990788",
  howpublished="online",
  institution="AIP",
  number="0",
  volume="111",
  year="2017",
  month="october",
  pages="1--4",
  publisher="AIP",
  type="journal article in Web of Science"
}