Heteroatoms as Rotational Blocking Groups for Non-Fullerene Acceptors in Indoor Organic Solar Cells,ACS Energy Letters

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Heteroatoms as Rotational Blocking Groups for Non-Fullerene Acceptors in Indoor Organic Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-04-11 , DOI: 10.1021/acsenergylett.2c00515
Chase L. Radford ₁ , Priyadarshani D. Mudiyanselage ₁ , Amy L. Stevens ₁ , Timothy L. Kelly ₁

Affiliation

Organic solar cells are particularly attractive for indoor and low-light applications; however, photocurrents are low under these conditions, and devices are particularly sensitive to the presence of defects and trap states. A rotational blocking group is often added to non-fullerene acceptors to reduce both energetic disorder and the number of defects in the active layer. These blocking groups are most often alkyl chains, which require several synthetic steps to install; this inevitably lowers yields and increases costs. Here we report the addition of heteroatom-based blocking groups to the commonly used non-fullerene acceptor IDIC. These blocking groups are synthetically easy to install and highly effective; bromination leads to significant improvements in the efficiency of PTQ10:IDIC devices under both one-sun and low-light illumination. In contrast, thioether blocking groups improve efficiency under one-sun illumination but reduce it in dim light, highlighting the need to design and test donor:acceptor systems specifically for indoor applications.

中文翻译：

杂原子作为室内有机太阳能电池中非富勒烯受体的旋转阻挡基团

有机太阳能电池对于室内和弱光应用特别有吸引力；然而，在这些条件下，光电流很低，并且器件对缺陷和陷阱状态的存在特别敏感。通常将旋转封闭基团添加到非富勒烯受体中以减少活性层中的能量无序和缺陷数量。这些保护基团通常是烷基链，需要几个合成步骤才能安装；这不可避免地会降低产量并增加成本。在这里，我们报告了向常用的非富勒烯受体 IDIC 添加基于杂原子的封闭基团。这些封闭基团综合起来易于安装且非常有效；溴化可显着提高 PTQ10:IDIC 器件在单太阳和弱光照明下的效率。

更新日期：2022-04-11

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