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首页> 外文期刊>Advanced Functional Materials >Perylene Diimide-Based Nonfullerene Polymer Solar Cells with over 11% Efficiency Fabricated by Smart Molecular Design and Supramolecular Morphology Optimization
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Perylene Diimide-Based Nonfullerene Polymer Solar Cells with over 11% Efficiency Fabricated by Smart Molecular Design and Supramolecular Morphology Optimization

机译：通过智能分子设计和超分子形态优化制造的基于ylene二酰亚胺的非富勒烯聚合物太阳能电池的效率超过11％

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摘要

A series of perylene diimide (PDI) derivatives, TPP-PDI, TPO-PDI, and TPS-PDI, are developed for nonfullerene polymer solar cells (NF-PSCs) by flaking three PDI skeletons around 3D central cores with different configurations and electronic states, such as triphenylphosphine (TPP), triphenylphosphine monoxide (TPO), and triphenylphosphine sulfide (TPS). These small-molecule acceptors have a "three-wing propeller" structure due to their similar backbones. By changing the electron density of phosphorus atoms through oxidation and sulfuration, the "folding-back" strength is decreased, resulting in a less twisted molecular conformation. The stronger electron-withdrawing ability of the oxygen atom affords TPO-PDI the least twisted conformation, which enhances the crystallinity of this complex. NF-PSCs based on PTTEA:TPO-PDI exhibit a high power conversion efficiency (PCE) of 8.65%. Ultimately, the joint "molecular lock" effect arising from O-H center dot center dot center dot F and O-H center dot center dot center dot O=P supramolecular interactions is achieved by introducing 4,4'-biphenol as an additive, which successfully promotes fibril-like phase separation and blend morphology optimization to generate the highest PCE of 11.01%, which is currently the highest value recorded for NF-PSCs based on PDI acceptors.
机译：针对非富勒烯聚合物太阳能电池（NF-PSC），开发了一系列of二酰亚胺（PDI）衍生物TPP-PDI，TPO-PDI和TPS-PDI，方法是将3个PDI骨架围绕3D中心核以不同的构型和电子状态进行剥落，例如三苯膦（TPP），三苯膦一氧化碳（TPO）和三苯膦硫化物（TPS）。这些小分子受体由于其相似的骨架而具有“三翼螺旋桨”结构。通过氧化和硫化作用改变磷原子的电子密度，“折返”强度降低，导致分子构象较少扭曲。氧原子更强的吸电子能力使TPO-PDI的扭曲构象最少，从而增强了该配合物的结晶度。基于PTTEA：TPO-PDI的NF-PSC表现出8.65％的高功率转换效率（PCE）。最终，通过引入4,4'-双酚作为添加剂，可以实现由OH中心点中心点中心点F和OH中心点中心点中心点O = P超分子相互作用引起的联合“分子锁”效应类相分离和混合形态优化，以产生11.01％的最高PCE，这是目前基于PDI受体的NF-PSC记录的最高值。

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