Vertical Distribution to Optimize Active Layer Morphology for Efficient All-Polymer Solar Cells by J71 as a Compatibilizer
Vertical Distribution to Optimize Active Layer Morphology for Efficient All-Polymer Solar Cells by J71 as a Compatibilizer
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DOI：
10.1021/acs.macromol.9b00411
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发表时间：
2019-05
期刊：
影响因子：
5.5
通讯作者：
Siqi Liu;Dong Chen;Weihua Zhou;Zoukangning Yu;Lie Chen;Feng Liu;Yiwang Chen
中科院分区：
文献类型：
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作者：
Siqi Liu;Dong Chen;Weihua Zhou;Zoukangning Yu;Lie Chen;Feng Liu;Yiwang Chen
从混相的观点来看，第三种聚合物如何影响由聚合物供体和聚合物受体组成的活性层的形态演变机制尚不清楚。在本文中，J71被纳入PBDB-T:PNDI-2T-TR(5)体系中，得到了一个三元全聚合物太阳能电池，其最大功率转换效率为9.12%。观察到J71除了与其他聚合物形成级联能级排列外，还可以提供互补吸收，证明了从J71到PBDB-T的福斯特共振能量转移。通过动态力学分析和差示扫描量热技术相结合，根据Fox方程分析，J71:PNDI-2T-TR(5)共混物的混相性优于PBDB-T:PNDI-2T-TR(5)共混物，其Flory-Huggins相互作用参数分别为- 1.003和0.006。J71可以作为增容剂，优化活性层的形态，使P富集。
From the miscibility viewpoint, the mechanism of how the third polymer influences the morphology evolution of an active layer composed of a polymer donor and a polymer acceptor remains to be unknown. In this article, J71 was incorporated into the PBDB-T:PNDI-2T-TR(5) system to afford a ternary all-polymer solar cell showing the maximal power conversion efficiency of 9.12%. It is observed that J71 could provide complementary absorption in addition to the formation of cascade energy-level alignment with other polymers, demonstrating a Forster resonance energy transfer from J71 to PBDB-T. By the combination of dynamic mechanical analysis and differential scanning calorimetry techniques, the miscibility in the J71:PNDI-2T-TR(5) blend is better than that in the PBDB-T:PNDI-2T-TR(5) blend according to Fox equation analysis, showing Flory–Huggins interaction parameters of −1.003 and 0.006, respectively. J71 could serve as a compatibilizer to optimize the morphology of the active layer, leading to enrichment of P...