Length Effect of Alkyl Linkers on the Crystalline Transition in Naphthalene Diimide-Based Double-Cable Conjugated Polymers,Macromolecules

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Length Effect of Alkyl Linkers on the Crystalline Transition in Naphthalene Diimide-Based Double-Cable Conjugated Polymers
Macromolecules ( IF 5.1 ) Pub Date : 2022-06-08 , DOI: 10.1021/acs.macromol.2c00444
Zhijie Hu ₁ , Chengyi Xiao ₁ , Wen Liang Tan ₂ , Baiqiao Liu ₁ , Shijie Liang ₁ , Xudong Jiang ₃ , Christopher R. McNeil ₂ , Weiwei Li ₁

Affiliation

The alkyl chains as linkers in double-cable conjugated polymers play an important role in the solubility, packing motif, morphology, and voltage loss in single-component organic solar cells (SCOSCs). In this work, we incorporate alkyl linkers with lengths from hexyl (C₆H₁₂) to hexadecyl (C₁₆H₃₂) into naphthalene diimide-based double-cable conjugated polymers. These polymers show a parabolic-type distribution in crystallinity, in which the crystalline degree of the polymers is enhanced in sequence from P06 (C₆H₁₂ linker) to P12 (C₁₂H₂₄ linker) and then decreased in longer alkyl linkers. These differences bring into deviations like optical bandgaps, packing motif, charge transport, and photovoltaic performance in SCOSCs. This work demonstrates the importance of linkers’ length on crystallinity and packing motif as well as provides a new viewpoint in guiding the design of new double-cable conjugated polymers.

中文翻译：

烷基连接体对萘二亚胺基双索共轭聚合物结晶转变的长度影响

烷基链作为双电缆共轭聚合物中的接头，在单组分有机太阳能电池 (SCOSC) 中的溶解度、堆积基序、形态和电压损失方面发挥着重要作用。在这项工作中，我们将长度从己基 (C ₆ H ₁₂ ) 到十六烷基 (C ₁₆ H ₃₂ ) 的烷基接头结合到基于萘二亚胺的双电缆共轭聚合物中。这些聚合物的结晶度呈抛物线型分布，其中聚合物的结晶度从P06（C ₆ H ₁₂接头）到P12（C ₁₂ H ₂₄接头），然后在较长的烷基接头中减少。这些差异导致 SCOSC 中的光学带隙、包装图案、电荷传输和光伏性能等偏差。这项工作证明了接头长度对结晶度和包装基序的重要性，并为指导新型双索共轭聚合物的设计提供了新的视角。

更新日期：2022-06-08

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