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The Impact of Solvent Vapor on the Film Morphology and Crystallization Kinetics of Lead Halide Perovskites during Annealing

Title data

Zhong, Yu ; Seeberger, Dominik ; Herzig, Eva M. ; Köhler, Anna ; Panzer, Fabian ; Li, Cheng ; Hüttner, Sven:
The Impact of Solvent Vapor on the Film Morphology and Crystallization Kinetics of Lead Halide Perovskites during Annealing.
In: ACS Applied Materials & Interfaces. Vol. 13 (20 September 2021) . - pp. 45365-45374.
ISSN 1944-8244
DOI: https://doi.org/10.1021/acsami.1c09075

Abstract in another language

One of the key factors for the remarkable improvements of halide perovskite solar cells over the last few years is the increased control over perovskite crystallinity and its thin film morphology. Among various processing methods, solvent vapor-assisted annealing (SVAA) has proven to be promising in achieving high-quality perovskite films. However, a comprehensive understanding of the perovskite crystallization process during SVAA is still lacking. In this work, we use a home-built setup to precisely control the SVAA conditions to investigate in detail the perovskite crystallization kinetics. By changing the solvent vapor concentration during annealing, the perovskite grain size can be tuned from 200 nm to several micrometers. We monitor the crystallization kinetics during solvent-free annealing and SVAA using in situ grazing incidence wide-angle X-ray scattering, where we find a diminished perovskite growth rate and the formation of low dimensional perovskite at the top of the perovskite layer during SVAA. Scanning electron microscopy images of the final films further suggest that the perovskite growth follows an Ostwald ripening process at higher solvent concentrations. Thus, our results will contribute to achieve a more targeted processing of perovskite films.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PMID: 3452261
Institutions of the University: Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation - Juniorprof. Dr. Eva Maria Herzig
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 22 Sep 2021 10:56
Last Modified: 25 Nov 2021 13:50
URI: https://eref.uni-bayreuth.de/id/eprint/67083