Ferroelectric Properties of Perovskite Thin Films and Their Implications for Solar Energy Conversion.
- Resource Type
- Academic Journal
- Authors
- Röhm H; Karlsruhe Institute of Technology, Light Technology Institute (LTI), Engesserstrasse 13, 76131, Karlsruhe, Germany.; Karlsruhe Institute of Technology, Material Research Center for Energy Systems (MZE), Strasse am Forum 7, 76131, Karlsruhe, Germany.; Leonhard T; Karlsruhe Institute of Technology, Light Technology Institute (LTI), Engesserstrasse 13, 76131, Karlsruhe, Germany.; Karlsruhe Institute of Technology, Material Research Center for Energy Systems (MZE), Strasse am Forum 7, 76131, Karlsruhe, Germany.; Schulz AD; Karlsruhe Institute of Technology, Light Technology Institute (LTI), Engesserstrasse 13, 76131, Karlsruhe, Germany.; Karlsruhe Institute of Technology, Material Research Center for Energy Systems (MZE), Strasse am Forum 7, 76131, Karlsruhe, Germany.; Wagner S; Karlsruhe Institute of Technology, Institute for Applied Materials - Ceramic Materials and Technologies (IAM), Haid-und-Neu-Strasse 7, 76131, Karlsruhe, Germany.; Hoffmann MJ; Karlsruhe Institute of Technology, Material Research Center for Energy Systems (MZE), Strasse am Forum 7, 76131, Karlsruhe, Germany.; Karlsruhe Institute of Technology, Institute for Applied Materials - Ceramic Materials and Technologies (IAM), Haid-und-Neu-Strasse 7, 76131, Karlsruhe, Germany.; Colsmann A; Karlsruhe Institute of Technology, Light Technology Institute (LTI), Engesserstrasse 13, 76131, Karlsruhe, Germany.; Karlsruhe Institute of Technology, Material Research Center for Energy Systems (MZE), Strasse am Forum 7, 76131, Karlsruhe, Germany.
- Source
- Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 9885358 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1521-4095 (Electronic) Linking ISSN: 09359648 NLM ISO Abbreviation: Adv Mater Subsets: PubMed not MEDLINE
- Subject
- Language
- English
Whether or not methylammonium lead iodide (MAPbI 3 ) 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 MAPbI 3 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.
(© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)