Ferroelectric Properties of Perovskite Thin Films and Their Implications for Solar Energy Conversion
Röhm, Holger
1; Leonhard, Tobias 1; Schulz, Alexander D. 1; Wagner, Susanne 2; Hoffmann, Michael J. 2; Colsmann, Alexander
1,3
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1), Karlsruher Institut für Technologie (KIT)
3 Materialwissenschaftliches Zentrum für Energiesysteme (MZE), Karlsruher Institut für Technologie (KIT)
1; Leonhard, Tobias 1; Schulz, Alexander D. 1; Wagner, Susanne 2; Hoffmann, Michael J. 2; Colsmann, Alexander
1,31 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1), Karlsruher Institut für Technologie (KIT)
3 Materialwissenschaftliches Zentrum für Energiesysteme (MZE), Karlsruher Institut für Technologie (KIT)
Abstract:
Whether or not methylammonium lead iodide (MAPbI3) is a ferroelectric
semiconductor has caused controversy in the literature, fueled by many
misunderstandings and imprecise definitions. Correlating recent literature
reports and generic crystal properties with the authors’ experimental
evidence, the authors show that MAPbI3 thin-films are indeed semiconducting
ferroelectrics and exhibit spontaneous polarization upon transition from the
cubic high-temperature phase to the tetragonal phase at room temperature.
The polarization is predominantly oriented in-plane and is organized in
characteristic domains as probed with piezoresponse force microscopy.
Drift-diffusion simulations based on experimental patterns of polarized
domains indicate a reduction of the Shockley–Read–Hall recombination of
charge carriers within the perovskite grains due to the ferroelectric built-in field
and allow reproduction of the electrical solar cell properties.
semiconductor has caused controversy in the literature, fueled by many
misunderstandings and imprecise definitions. Correlating recent literature
reports and generic crystal properties with the authors’ experimental
evidence, the authors show that MAPbI3 thin-films are indeed semiconducting
ferroelectrics and exhibit spontaneous polarization upon transition from the
cubic high-temperature phase to the tetragonal phase at room temperature.
The polarization is predominantly oriented in-plane and is organized in
characteristic domains as probed with piezoresponse force microscopy.
Drift-diffusion simulations based on experimental patterns of polarized
domains indicate a reduction of the Shockley–Read–Hall recombination of
charge carriers within the perovskite grains due to the ferroelectric built-in field
and allow reproduction of the electrical solar cell properties.
| Zugehörige Institution(en) am KIT | Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1) Lichttechnisches Institut (LTI) Materialwissenschaftliches Zentrum für Energiesysteme (MZE) Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsjahr | 2019 |
| Sprache | Englisch |
| Identifikator | ISSN: 0935-9648 urn:nbn:de:swb:90-916657 KITopen-ID: 1000091665 |
| Erschienen in | Advanced materials |
| Verlag | John Wiley and Sons |
| Seiten | Art.Nr.: 1806661 |
| Vorab online veröffentlicht am | 20.02.2019 |
| Schlagwörter | ferroelectric domains, perovskite solar cells, piezoresponse force, microscopy |
| Nachgewiesen in | Web of Science Dimensions Scopus |