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Fullerene-free polymer solar cell devices based on a new acceptor, H-tri-PDI that is connected by three perylene diimide (PDI) units via imide position shows a power conversation efficiency of 7.25% with a short circuit current density of 16.5 mA cm−2. Thus H-tri-PDI molecules and the method of connecting multiple PDI units via imide position provide a reliable guide for the further development of PDI-based acceptors.
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Liang et al. (2016) studied this question.
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