Two conjugated polymers based on diketopyrrolopyrrole (DPP) in the main chain with different content of perylene bisimide (PBI) side chains are developed. The influence of PBI side chain on the photovoltaic performance of these DPP‐based conjugated polymers is systematically investigated. This study suggests that the PBI side chains can not only alter the absorption spectrum and energy level but also enhance the crystallinity of conjugated polymers. As a result, such polymers can act as electron donor, electron acceptor, and single‐component active layer in organic solar cells. These findings provide a new guideline for the future molecular design of multifunctional conjugated polymers.

中文翻译：

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带有双联双酰亚胺侧链的多功能基于二酮吡咯并吡咯的共轭聚合物

开发了两种基于二酮吡咯并吡咯（DPP）的共轭聚合物，其主链上per双酰亚胺（PBI）侧链的含量不同。系统地研究了PBI侧链对这些基于DPP的共轭聚合物的光伏性能的影响。这项研究表明，PBI侧链不仅可以改变吸收光谱和能级，而且可以增强共轭聚合物的结晶度。因此，此类聚合物可以充当有机太阳能电池中的电子给体，电子受体和单组分活性层。这些发现为多功能共轭聚合物的未来分子设计提供了新的指导。