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20 August 2020 The molecular organisation of non-fullerene acceptors for organic photovoltaics
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Abstract
The development of Non-Fullerene Acceptors (NFAs) for Organic Photovoltaics (OPV) has pushed the device power conversion efficiency over 15%. However, the commercialisation of OPV modules by the roll-to-roll industries requires the processing of thick active-layer films (150-300 nm) and therefore materials with high charge carrier mobilities. The anisotropy and bidimensionality of the NFAs conjugated structure are critical to their solid-state organisation, which in turn affects their electronic functions (e.g. carrier mobility). With our work, we show first insights into the crystallisation of a series of ten commonly used NFAs and its effect on the charge transport, identifying how the structural design of the NFAs facilitates their organisational motifs in the solid-state and exploring the importance of the crystal packing and topological connectivity on the charge transport.
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Pierluigi Mondelli, Graham E. Morse, and Moritz K. Riede "The molecular organisation of non-fullerene acceptors for organic photovoltaics", Proc. SPIE 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI, 114740F (20 August 2020); https://doi.org/10.1117/12.2568452
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