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Lookup NU author(s): Professor Mark Geoghegan
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Institution of Engineering and Technology, 2017.
For re-use rights please refer to the publisher's terms and conditions.
© The Institution of Engineering and Technology 2017. Spin coating, typically used to achieve nanometre thick films, is the established method for depositing perovskite precursors at lab scale for use in solar cells. This study investigates the dynamics of spin coating perovskite. By combining experimental measurement with a semi-empirical model the evaporation rate of the dimethylformamide solvent during the spin coating of a mixed lead halide precursor is determined to be 1.2 × 10-8 m/s. When K-bar coating the same precursor the solvent does not significantly evaporate during the deposition process and when this film is crystallised on a hot plate a rough film results which gives a power conversion efficiency (PCE) of less than 2%. By increasing the airflow of the K-bar coated perovskite film during crystallisation to 2.7 × 10-4 m/s the PCE increases significantly to 8.5% through an improvement in short-circuit current and fill factor.
Author(s): Baker JA, Mouhamad Y, Hooper KEA, Burkitt D, Geoghegan M, Watson TM
Publication type: Article
Publication status: Published
Journal: IET Renewable Power Generation
Print publication date: 29/05/2017
Online publication date: 15/12/2016
Acceptance date: 12/12/2016
Date deposited: 05/08/2021
ISSN (print): 1752-1416
ISSN (electronic): 1752-1424
Publisher: Institution of Engineering and Technology
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