Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite

Content Provider	Semantic Scholar
Author	Hermes, Ilka M. Bretschneider, Simon A. Bergmann, Victor W. Klasen, Alexander Mars, Julian Tremel, Wolfgang Laquai, Frédéric Butt, Hans-Jürgen Mezger, Markus Berger, Rüdiger Rodriguez, Brian J. Weber, Stefan A. L.
Copyright Year	2016
Abstract	Methylammonium lead iodide (MAPbI3) perovskite shows an outstanding performance in photovoltaic devices. However, certain material properties, especially the possible ferroic behavior, remain unclear. We observed distinct nanoscale periodic domains in the piezoresponse of MAPbI3(Cl) grains. The structure and the orientation of these striped domains indicate ferroelasticity as their origin. By correlating vertical and lateral piezoresponse force microscopy experiments performed at different sample orientations with X-ray diffraction, the preferred domain orientation is suggested to be the a1–a2-phase. The observation of these ferroelastic fingerprints appears to strongly depend on the film texture and thus the preparation route. The ferroelastic twin domains could form due to the introduction of strain during the cubic−tetragonal phase transition.
Starting Page	5724
Ending Page	5731
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1021/acs.jpcc.5b11469
Volume Number	120
Alternate Webpage(s)	https://repository.kaust.edu.sa/bitstream/handle/10754/596362/acs2Ejpcc2E5b11469.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article