Further Understanding the Solution Chemisty of Perovskite Precursor Solutions
Mary E. O'Kane a, Joel A. Smith a, Tarek I. Alanazi a, Elena J. Cassella a, Onkar Game a, David G. Lidzey a
a Department of Physics and Astronomy, University of Sheffield, UK, Hounsfield Road, United Kingdom
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Poster, Mary E. O'Kane, 208
Publication date: 20th April 2022

One major benefit of using perovskite solar cells (PSCs) is their compatibility with solution processing techniques, which are already widely used in industry. Therefore, increasing our understanding of the solution chemistry of these perovskite precursors is vital if optimum PSC performance is to be achieved. Additionally if these devices are going to be adapted to industry standards, knowing an inks shelf life will be crucial, and increasing this would be most beneficial.

We have worked to understand and increase the lifetime of high-performing complex PSC inks (i.e. triple-cation mixed-halide formulations - CsFAMAPb(IxBr1-x)3) and found that by adapting the storage conditions of these inks, we can drastically improve ink lifetime1. We can identify solvent factors that affect ink stability and pinpoint reactions with organic cations in solution that may lead to this ink degradation.

This work was funded by the Engineering and Physical Sciences Research Council (EPSRC) grant EP/S009213/1 (The integration of photovoltaic devices with carbon-fibre composites). M.E.O'K. thanks the EPSRC for PhD studentship from the Centre for Doctoral Training in Polymers, Soft Matter and Colloids, EP/L016281/1, and J.A.S. and E.C. thank the EPSRC for PhD studentships from the Centre for Doctoral Training in New and Sustainable PV, EP/L01551X/1. T.I.A. thanks the Saudi Government for funding via a PhD studentship.

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