TY  - JOUR
AU  - Leonhard, Tobias
AU  - Schulz, Alexander D.
AU  - Röhm, Holger
AU  - Wagner, Susanne
AU  - Altermann, Fabian J.
AU  - Rheinheimer, Wolfgang
AU  - Hoffmann, Michael J.
AU  - Colsmann, Alexander
TI  - Probing the Microstructure of Methylammonium Lead Iodide Perovskite Solar Cells
JO  - Energy technology
VL  - 7
IS  - 3
SN  - 2194-4296
CY  - Weinheim [u.a.]
PB  - Wiley-VCH
M1  - FZJ-2020-04449
SP  - 1800989 -
PY  - 2019
AB  - The microstructure of absorber layers is pivotally important for all thin‐film solar technologies. Using electron backscattered diffraction (EBSD), the crystal orientation in methylammonium lead iodide thin films with submicrometer resolution is reported. For the vast majority of (110) oriented grains, the c‐axis of the perovskite unit cell is oriented in‐plane. Although some adjacent grains exhibit the same in‐plane horizontal orientation of the c‐axis, no universal horizontal orientation of the c‐axis within the sample plane exists. The (110) crystal orientation correlates with an in‐plane orientation of the ferroelectric polarization as investigated by vertical and lateral piezoresponse force microscopy (PFM). The individual grains with different crystal orientations that exhibit different ferroelectric patterns and surface potentials are identified. The strong correlation between crystal orientation and ferroelectric polarization allows conclusions to be drawn about the microstructure from PFM measurements and, likewise, the ferroelectric polarization to be derived from crystallographic observations by EBSD. 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000462449500019
DO  - DOI:10.1002/ente.201800989
UR  - https://juser.fz-juelich.de/record/887823
ER  -