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3 October 2022 The crystal packing of non-fullerene acceptors in organic solar cells
Pierluigi Mondelli, Pascal Kaienburg, Francesco Silvestri, Eduardo Solano, Esther Barrena, Moritz Riede, Graham Morse
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Proceedings Volume PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII; PC122090N (2022) https://doi.org/10.1117/12.2635195
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States
Abstract
The efficiency of Organic Solar Cells (OSCs) has surpassed 18%, after a new generation of Non-Fullerene Acceptors (NFAs), the Y-series, was introduced to the field. These materials are characterised by high electron mobility, which is commonly attributed to its 3-dimensional packing motif in the single crystal. However, the bridge that links the NFA packing from single crystals to solar cells has not clearly been shown yet. In this work, we investigate the molecular organisation of a large body of NFAs, following the evolution of their packing motif in single-crystals, powder, and thin films made with pure NFAs and donor:NFA blends. We identified the most relevant packing motifs and polymorphs for the NFAs, discussing their role in the bulk heterojunction morphology, performance and charge transport, by combining experimental and theoretical approaches.
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Pierluigi Mondelli, Pascal Kaienburg, Francesco Silvestri, Eduardo Solano, Esther Barrena, Moritz Riede, and Graham Morse "The crystal packing of non-fullerene acceptors in organic solar cells", Proc. SPIE PC12209, Organic, Hybrid, and Perovskite Photovoltaics XXIII, PC122090N (3 October 2022); https://doi.org/10.1117/12.2635195
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KEYWORDS
Crystals
Solar cells
Organic photovoltaics
Single crystal X-ray diffraction
Bridges
Heterojunctions
Lithium
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