Influence of N‐Substituents on Photovoltaic Properties of Singly Bay‐Linked Dimeric Perylene Diimides
Influence of N‐Substituents on Photovoltaic Properties of Singly Bay‐Linked Dimeric Perylene Diimides
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N-取代基对单湾连接二聚苝二酰亚胺光伏性能的影响
DOI：
10.1002/chem.202102318
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Takahashi Masaki
中科院分区：
文献类型：
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作者：
Izawa Seiichiro;Uchida Kentaro;Nakamura Mayuko;Fujimoto Keisuke;Roudin Jeremy;Lee Ji‐Hyun;Inuzuka Toshiyasu;Nakamura Takumi;Sakamoto Masami;Nakayama Yasuo;Hiramoto Masahiro;Takahashi Masaki
系统地研究了n取代基对单bay - linked苝二酰亚胺（dipdi）光伏性能的影响，以了解芳香-脂肪族平衡，这有利于实现有机光伏（OPV）系统中高性能的器件。利用新开发的一步法成功地合成了各种n -取代的双pdi，并获得了足够高的产率。对7种变体的详细研究表明，伯烷基取代基，特别是2 -乙基己基，诱导了高结晶度薄膜的自组织生长。这有利于提高体异质结（BHJ）系统的器件性能。本文的研究结果揭示了烷基侧链作为疏水增溶助剂或主要决定因素在控制活性层纳米形态中的重要作用。这为开发未来实际应用的高性能有机半导体材料提供了有价值的指导。
The influence ofN‐substituents on the photovoltaic properties of singly bay‐linked perylene diimides (diPDIs) was systematically investigated to understand the aromatic‐aliphatic balance, which is beneficial for achieving high device performance in organic photovoltaic (OPV) systems. The synthesis of variousN‐substituted diPDIs was successfully achieved using a newly developed one‐step procedure, resulting in sufficiently high yields. Detailed investigations of seven variants of diPDIs demonstrated that the primary alkyl substituents, particularly the 2‐ethylhexyl group, induce the self‐organized growth of thin films with high crystallinity. This is beneficial for enhancing the device performance of bulk heterojunction (BHJ) systems. The results presented herein reveal the important roles of alkyl side chains as hydrophobic solubilizing auxiliaries or primary determinants in the control of the active layer nanomorphology. This offers a valuable guideline that is essential for developing high‐performance organic semiconductor materials for future practical applications.