Hybrid Tetrameric Perylene Diimide Assemblies,ChemSusChem

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Hybrid Tetrameric Perylene Diimide Assemblies
ChemSusChem ( IF 7.5 ) Pub Date : 2021-01-26 , DOI: 10.1002/cssc.202002784
Jonathan Cann ₁ , Mahmoud E Farahat ₁ , Gregory C Welch ₁

Affiliation

Organic photovoltaics have found utility as indoor light recycling devices providing an opportunity for the sustainable powering of IoT sensors and related smart electronics. In the report, two organic π-conjugated molecules consisting of four perylene diimide (PDI) chromophores each are presented and used as non-fullerene acceptors in indoor photovoltaic devices. The new materials consist of a dimeric N-annulated PDI core with single PDIs grafted onto the pyrrolic N-atom positions of the core. Compounds PDI₄e and PDI₄i are PDI tetramers and differ with PDI₄e having the terminal N-annulated PDI with pyrrolic N-atom distal to the core and PDI₄i having the terminal N-annulated PDI with pyrrolic N-atom proximal to the core. The structural and optoelectronic properties were investigated using NMR spectroscopy, optical absorption and emission spectroscopy, and cyclic voltammetry. The compounds exhibit typical optical signatures for PDIs but notable is that the addition of grafted PDI molecules prevents significant aggregation of the dimeric PDI core, as compared to a reference dimer. Use as non-fullerene acceptors in ternary bulk-heterojunction blends with the polymer FBT and fullerene PC₆₁BM lead to increased open-circuit voltages and power conversion efficiencies upwards of 13.7 % at 2000 lux light intensity.

中文翻译：

杂化四聚苝二亚胺组件

有机光伏已被用作室内光回收设备，为物联网传感器和相关智能电子设备的可持续供电提供了机会。在该报告中，提出了两种由四个苝二亚胺 (PDI) 发色团组成的有机 π 共轭分子，并将其用作室内光伏器件中的非富勒烯受体。新材料由二聚 N 环化 PDI 核组成，单个 PDI 接枝到核的吡咯 N 原子位置。化合物PDI ₄ ë和PDI ₄我是PDI四聚体，并与不同PDI ₄ ë具有端子N -环PDI与吡咯的N-原子远离芯和PDI ₄我具有末端 N 环化 PDI，吡咯 N 原子靠近核。使用核磁共振光谱、光吸收和发射光谱以及循环伏安法研究了结构和光电特性。这些化合物表现出典型的 PDI 光学特征，但值得注意的是，与参考二聚体相比，接枝 PDI 分子的添加防止了二聚体 PDI 核心的显着聚集。在与聚合物 FBT 和富勒烯 PC ₆₁ BM 的三元体异质结共混物中用作非富勒烯受体可在2000 勒克斯光强度下提高开路电压和功率转换效率高达 13.7%。

更新日期：2021-01-26

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