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Analysis reveals improved efficiency in organic solar cells using longer alkyl chains in pyrrole-based acceptors, indicating significant potential for non-halogenated processing.
A new NFA, BTz-δ-C 4 C 12 , was synthesized. The introduction of longer alkyl chains into the pyrrole unit suppresses excessive aggregation while maintaining sufficient π–π stacking. Therefore, the BTz-δ-C 4 C 12 -based device achieve an PCE of 16.6%.
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Luo et al. (2025) studied this question.
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