Synergetic Strategy for Highly Efficient and Super Flexible Thick-film Organic Solar Cells
Synergetic Strategy for Highly Efficient and Super Flexible Thick-film Organic Solar Cells
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高效、超柔性厚膜有机太阳能电池的协同策略
DOI：
10.1002/aenm.202201614
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发表时间：
2022-07-03
影响因子：
27.8
通讯作者：
Chu, Junhao
中科院分区：
文献类型：
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作者：
Wang, Jianxiao;Han, Chenyu;Chu, Junhao
配备厚膜活性层和高柔性的高效有机太阳能电池（OSC）对于工业制备和实际应用具有重要意义。在此，采用三元策略与功能添加剂相结合来获得高效的厚膜柔性OSC。合成了具有良好平面性的新型聚合物供体 PBB1-F 作为第三组分，以优化光子捕获和分子堆叠。同时，具有强附着力的高介电常数聚芳醚（PAE）功能添加剂不仅大大提高了激子解离效率，而且还起到锁笼作用，有效增强有源层的机械稳定性。结果，带有PAE的PM6:PBB1-F:Y6-BO-4Cl和PM6:PBB1-F:BTP-eC9基三元OSC在刚性薄膜状态下表现出17.91%和18.51%的效率，并且在刚性（16.40%和16.84%）和柔性（14.78%和14.78%）的厚膜状态下表现更好。 14.95%）。在聚合物、紧密缠结和笼状PAE粘附的保护下，活性层的断裂伸长率增加了四倍以上（27.3％），并给出了超柔性厚膜OSC，在直径10毫米的1000次弯曲循环后仍保持90％以上的性能。总的来说，这项工作提供了一种新的可行方案，可以有效解决有机光伏应用中的厚度敏感性和灵活性问题。
Efficient organic solar cells (OSCs) equipped with thick-film active layers and high flexibility are of great significance for industrial preparation and practical applications. Herein, a ternary strategy coupled with a functional additive is employed to obtain efficient thick-film flexible OSCs. A novel polymer donor PBB1-F with good planarity is synthesized as a third component to optimize photon capture and molecular stacking. Meanwhile, a high dielectric constant polyarene ether (PAE) functional additive with strong adhesion not only greatly improves exciton dissociation efficiency, but also acts as locking cage-like for effective enhancement of the mechanical stability of active layer. As a result, the PM6:PBB1-F:Y6-BO-4Cl and PM6:PBB1-F:BTP-eC9 based ternary OSCs with PAE exhibit an efficiency of 17.91% and 18.51% under rigid thin-film state, and perform better under thick-film state of rigid (16.40% and 16.84%) and flexible (14.78% and 14.95%). Under the protection of the polymers, tight entanglement and cage-like PAE adhesion, the elongation at break of the active layer increases by more than fourfold (27.3%), and gives a super flexible thick-film OSCs that maintains more than 90% performance after 1000 bending cycles with a diameter of 10 mm. Overall, this work provides a new feasible scheme to effectively solve thickness sensitivity and flexibility issues in the context organic photovoltaic applications.