Aromatic side chain manipulation in A–DA′D–A type acceptors for organic photovoltaics†

IF 6 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Chemistry Frontiers Pub Date : 2024-08-22 DOI:10.1039/D4QM00465E

ChengLong Wen, Jun Yuan, Zhiguo Zhang, Dongxu Li, Yuqian Zhou, Wanqiang Liu, Zaichun Zhou, Yungui Li, Lihui Jiang and Yingping Zou

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Abstract

Organic photovoltaics based on narrow band gap small molecule acceptors (SMAs) having structural tunability have received tremendous attention in recent years because of their high device performance. Side chain engineering can be used to directly tune the molecular packing and energy levels, and therefore the fill factor and V_OC in devices, which is a convenient and feasible strategy to improve device efficiency. In the current study, three small molecule acceptors BTP-0-iPr, BTP-1-iPr and BTP-3-iPr based on the Y6 backbone with different side chains were designed, synthesized and characterized. The photoelectric properties and the impact on device performance resulting from the steric hindrance of different aromatic chains linked to the central backbone were discussed. The developed BTP-1-iPr with side chains of 4-isopropylphenyl achieves a power conversion efficiency (PCE) of 17.19%, together with the PM6 donor. The results highlight the potential of phenylalkyl side chains with large steric hindrance for the improvement of photovoltaic performance for devices based on small molecule acceptors.

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用于有机光伏的 A-DA′D-A 型受体中的芳香族侧链操作

基于具有结构可调性的窄带隙小分子受体（SMAs）的有机光伏技术因其高器件性能而在近年来受到极大关注。侧链工程可用于直接调节分子堆积和能级，从而调节器件的填充因子和 VOC，是提高器件效率的一种方便可行的策略。本研究设计、合成并表征了三种基于 Y6 主干、具有不同侧链的小分子受体 BTP-0-iPr、BTP-1-iPr 和 BTP-3-iPr。讨论了光电特性以及与中心骨架相连的不同芳香链的立体阻碍对器件性能的影响。所开发的具有 4-isopropylphenyl 侧链的 BTP-1-iPr 与 PM6 供体一起实现了 17.19% 的功率转换效率 (PCE)。这些结果凸显了具有大立体阻碍的苯基烷基侧链在提高基于小分子受体的器件的光伏性能方面的潜力。

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来源期刊

Materials Chemistry Frontiers Materials Science-Materials Chemistry

CiteScore

12.00

自引率

2.90%

发文量

313

期刊介绍： Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome. This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.