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  4. Crystal Orientation and Grain Size: Do They Determine Optoelectronic Properties of MAPbI(3) Perovskite?
 
research article

Crystal Orientation and Grain Size: Do They Determine Optoelectronic Properties of MAPbI(3) Perovskite?

Muscarella, Loreta A.
•
Hutter, Eline M.
•
Sanchez, Sandy  
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October 17, 2019
The Journal of Physical Chemistry Letters

Growing large, oriented grains of perovskite often leads to efficient devices, but it is unclear if properties of the grains are responsible for the efficiency. Domains observed in SEM are commonly misidentified with crystallographic grains, but SEM images do not provide diffraction information. We study methylammoinium lead iodide (MAPbI(3)) films fabricated via flash infrared annealing (FIRA) and the conventional antisolvent (AS) method by measuring grain size and orientation using electron back-scattered diffraction (EBSD) and studying how these affect optoelectronic properties such as local photoluminescence (PL), charge carrier lifetimes, and mobilities. We observe a local enhancement and shift of the PL emission at different regions of the FIRA clusters, but we observe no effect of crystal orientation on the optoelectronic properties. Additionally, despite substantial differences in grain size between the two systems, we find similar optoelectronic properties. These findings show that optoelectronic quality is not necessarily related to the orientation and size of crystalline domains.

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Type
research article
DOI
10.1021/acs.jpclett.9b02757
Web of Science ID

WOS:000492425100004

Author(s)
Muscarella, Loreta A.
Hutter, Eline M.
Sanchez, Sandy  
Dieleman, Christian D.
Savenije, Tom J.
Hagfeldt, Anders  
Saliba, Michael  
Ehrler, Bruno
Date Issued

2019-10-17

Published in
The Journal of Physical Chemistry Letters
Volume

10

Issue

20

Start page

6010

End page

6018

Subjects

Chemistry, Physical

•

Nanoscience & Nanotechnology

•

Materials Science, Multidisciplinary

•

Physics, Atomic, Molecular & Chemical

•

Chemistry

•

Science & Technology - Other Topics

•

Materials Science

•

Physics

•

lead halide perovskites

•

solar-cells

•

thin-films

•

surface-defects

•

recombination

•

boundaries

•

heterogeneity

•

performance

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSPM  
Available on Infoscience
November 6, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/162725
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