O'Kane, M.E., Smith, J.A. orcid.org/0000-0001-6889-4408, Alanazi, T.I. et al. (4 more authors) (2021) Perovskites on ice : an additive-free approach to increase the shelf-life of triple-cation perovskite precursor solutions. ChemSusChem, 14 (12). pp. 2537-2546. ISSN 1864-5631
Abstract
The development of stable perovskite precursor solutions is critical if solution-processable perovskite solar cells (PSCs) are to be practically manufacturable. Ideally, such precursors should combine high solution stability without using chemical additives that might compromise PSC performance. Here, we show that the shelf-life of high-performing perovskite precursors can be greatly improved by storing solutions at low-temperature without the need to alter chemical composition. We find that devices fabricated from solutions stored for 31-days at 4°C achieve a champion PCE of 18.6% (97% of original PCE). The choice of precursor solvent also impacts solution shelf-life, with DMSO-based solutions having enhanced solution stability compared to those including DMF. We explore the compositions of aged precursors using NMR spectroscopy and analyse films made from these solutions using X-ray diffraction. We conclude that the improvement in precursor solution stability is directly linked to the suppression of an addition-elimination reaction and the preservation of higher amounts of methylammonium within solution.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Authors. ChemSusChem published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Photovoltaic devices; solar cells; perovskites; stability; manufacture |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Science Research Council EP/S009213/1; EP/L016281/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Apr 2021 10:14 |
Last Modified: | 01 Mar 2022 15:02 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/cssc.202100332 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:173300 |