作者
Guitao Feng, Wenliang Tan, Safakath Karuthedath, Cheng Li, Xuechen Jiao, Amelia CY Liu, Hariprasad Venugopal, Zheng Tang, Long Ye, Frédéric Laquai, Christopher R McNeill, Weiwei Li
发表日期
2021/11/22
期刊
Angewandte Chemie International Edition
卷号
60
期号
48
页码范围
25499-25507
简介
We developed a series of highly crystalline double‐cable conjugated polymers for application in single‐component organic solar cells (SCOSCs). These polymers contain conjugated backbones as electron donor and pendant perylene bisimide units (PBIs) as electron acceptor. PBIs are connected to the backbone via alkyl units varying from hexyl (C6H12) to eicosyl (C20H40) as flexible linkers. For double‐cable polymers with short linkers, the PBIs tend to stack in a head‐to‐head fashion, resulting in large d‐spacings (e.g. 64 Å for the polymer P12 with C12H24 linker) along the lamellar stacking direction. When the length of the linker groups is longer than a certain length, the PBIs instead adopt a more ordered packing likely via H‐aggregation, resulting in short d‐spacings (e.g. 50 Å for the polymer P16 with C16H32 linker). This work highlights the importance of linker length on the molecular packing of the …
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