Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer
Beitrag in einer Fachzeitschrift
(Originalarbeit)
Details zur Publikation
Autor(en): Will J, Hou Y, Scheiner S, Pinkert U, Hermes IM, Weber SA, Hirsch A, Halik M, Brabec C, Unruh T
Zeitschrift: → Acs Applied Materials & Interfaces |
Jahr der Veröffentlichung: 2018
Band: 10
Heftnummer: 6
Seitenbereich: 5511-5518
ISSN: 1944-8244
Sprache: Englisch
Abstract
Current-voltage hysteresis is a major issue for normal architecture organo-halide perovskite
solar cells. In this manuscript we reveal a several Å thick Methylammonium Iodide (MAI) rich
interface between the perovskite and the metal oxide. Surface functionalization via selfassembled
monolayers (SAMs) 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 surface normal direction over the whole film thickness. The subnm
structural modifications of the buried interface were revealed by x-ray reflectivity (XRR),
which is most sensitive to monitor changes in the mass density of only several Å thin
interfacial layers as a function of substrate functionalization. From Kelvin probe force
microscopy (KPFM) on a solar cell cross section study, we further demonstrate local
variations of the potential on different electron transporting layers (ETLs) within a solar cell.
Based on these findings we present a unifying model explaining hysteresis in perovskite solar
cells, giving for the first time insight into one crucial aspect of hysteresis and paving the way
for new strategies in the fields of perovskite based opto-electronic devices.
FAU-Autoren / FAU-Herausgeber
| Brabec, Christoph Prof. Dr. |
| | Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie) |
|
| | | Professur für Werkstoffwissenschaften (Polymerwerkstoffe) |
|
| Hirsch, Andreas Prof. Dr. |
| | Lehrstuhl für Organische Chemie II |
|
| | | Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie) |
|
| | | Lehrstuhl für Organische Chemie II |
|
| | | Professur für Werkstoffwissenschaften (Polymerwerkstoffe) |
|
| | | Professur für Nanomaterialcharakterisierung (Streumethoden) |
|
| | | Lehrstuhl für Kristallographie und Strukturphysik |
|
Zusätzliche Organisationseinheit(en)
→ Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden |
|
Autor(en) der externen Einrichtung(en)
→ Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research |
Zitierweisen
APA: | Will, J., Hou, Y., Scheiner, S., Pinkert, U., Hermes, I.M., Weber, S.A.,... Unruh, T. (2018). Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer. Acs Applied Materials & Interfaces, 10(6), 5511-5518. https://dx.doi.org/10.1021/acsami.7b15904 |
MLA: | Will, Johannes, et al. "Evidence of Tailoring the Interfacial Chemical Composition in Normal Structure Hybrid Organohalide Perovskites by a Self-Assembled Monolayer." Acs Applied Materials & Interfaces 10.6 (2018): 5511-5518. |