ArticleACS applied materials & interfaces2025
Solvent Vapor Conditioning of Polymer-Polymer Organic Solar Cells.
Article in ACS applied materials & interfaces, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Despite rapid advances in all-polymer organic solar cells (OSCs), challenges remain in process optimization of their donor-acceptor heterostructure. Here, using all-polymer OSCs based on the state-of-the-art PM6:PYIT donor-acceptor system, we show that hot mixing of the donor and the acceptor polymer solutions can retain the desired disaggregated state of the acceptor polymer, significantly extending the pot life from 10 min to over 15 h, without harming the power conversion efficiency (PCE) of the fabricated solar cells. This enhanced processing stability enables systematic solvent vapor conditioning (SVC) to be conducted on the polymer films. We show that treatment by certain solvent vapors at activity ratios of 0.01-0.1, corresponding to subsaturation vapor pressures of 1-10%, respectively, can improve not only the open-circuit voltage (
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