Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer

Autoren

Johannes Will
Yi Hou
Simon Scheiner
Ute Pinkert
Ilka M Hermes
Stefan AL Weber
Andreas Hirsch
Marcus Halik
Christoph Brabec
Tobias Unruh

DOI

10.1021/acsami.7b15904

eISSN

1944-8252

ISSN

1944-8244

Ausgabe der Veröffentlichung

6

Zeitschrift

ACS Applied Materials & Interfaces

Sprache

en

Online publication date

2018

Paginierung

5511 - 5518

Datum der Veröffentlichung

2018

Status

Published

Herausgeber

American Chemical Society (ACS)

Herausgeber URL

http://dx.doi.org/10.1021/acsami.7b15904

Datum der Datenerfassung

2023

Titel

Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer

Ausgabe der Zeitschrift

10

Datenquelle: Crossref

Abstract

Current-voltage hysteresis is a major issue for normal architecture organo-halide perovskite solar cells. In this manuscript we reveal a several-angstrom thick methylammonium iodide-rich interface between the perovskite and the metal oxide. Surface functionalization via self-assembled monolayers allowed us to control the composition of the interface monolayer from Pb poor to Pb rich, which, in parallel, suppresses hysteresis in perovskite solar cells. The bulk of the perovskite films is not affected by the interface engineering and remains highly crystalline in the surface-normal direction over the whole film thickness. The subnanometer structural modifications of the buried interface were revealed by X-ray reflectivity, which is most sensitive to monitor changes in the mass density of only several-angstrom thin interfacial layers as a function of substrate functionalization. From Kelvin probe force microscopy study on a solar cell cross section, we further demonstrate local variations of the potential on different electron-transporting layers within a solar cell. On the basis of these findings, we present a unifying model explaining hysteresis in perovskite solar cells, giving an insight into one crucial aspect of hysteresis for the first time and paving way for new strategies in the field of perovskite-based opto-electronic devices.

Addresses

Institute for Crystallography and Structural Physics (ICSP), University of Erlangen-Nürnberg , Staudtstr. 3, 91058 Erlangen, Germany.

Autoren

Johannes Will
Yi Hou
Simon Scheiner
Ute Pinkert
Ilka M Hermes
Stefan AL Weber
Andreas Hirsch
Marcus Halik
Christoph Brabec
Tobias Unruh

DOI

10.1021/acsami.7b15904

eISSN

1944-8252

Externe Identifier

PubMed Identifier: 29355018

Funding acknowledgements

Deutsche Forschungsgemeinschaft:
Freistaat Bayern:

Open access

false

ISSN

1944-8244

Ausgabe der Veröffentlichung

6

Zeitschrift

ACS applied materials & interfaces

Sprache

eng

Medium

Print-Electronic

Online publication date

2018

Paginierung

5511 - 5518

Datum der Veröffentlichung

2018

Status

Published

Datum der Datenerfassung

2018

Titel

Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer.

Sub types

Journal Article

Ausgabe der Zeitschrift

10

Datenquelle: Europe PubMed Central

Abstract

Current-voltage hysteresis is a major issue for normal architecture organo-halide perovskite solar cells. In this manuscript we reveal a several-angstrom thick methylammonium iodide-rich interface between the perovskite and the metal oxide. Surface functionalization via self-assembled monolayers allowed us to control the composition of the interface monolayer from Pb poor to Pb rich, which, in parallel, suppresses hysteresis in perovskite solar cells. The bulk of the perovskite films is not affected by the interface engineering and remains highly crystalline in the surface-normal direction over the whole film thickness. The subnanometer structural modifications of the buried interface were revealed by X-ray reflectivity, which is most sensitive to monitor changes in the mass density of only several-angstrom thin interfacial layers as a function of substrate functionalization. From Kelvin probe force microscopy study on a solar cell cross section, we further demonstrate local variations of the potential on different electron-transporting layers within a solar cell. On the basis of these findings, we present a unifying model explaining hysteresis in perovskite solar cells, giving an insight into one crucial aspect of hysteresis for the first time and paving way for new strategies in the field of perovskite-based opto-electronic devices.

Autoren

Johannes Will
Yi Hou
Simon Scheiner
Ute Pinkert
Ilka M Hermes
Stefan AL Weber
Andreas Hirsch
Marcus Halik
Christoph Brabec
Tobias Unruh

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/29355018

DOI

10.1021/acsami.7b15904

eISSN

1944-8252

Ausgabe der Veröffentlichung

6

Zeitschrift

ACS Appl Mater Interfaces

Schlüsselwörter

Kelvin probe force microscopy
X-ray reflectivity
buried interface
hysteresis
perovskite solar cell

Sprache

eng

Country

United States

Paginierung

5511 - 5518

Datum der Veröffentlichung

2018

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2018

Titel

Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer.

Sub types

Journal Article

Ausgabe der Zeitschrift

10

Datenquelle: PubMed

Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer

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