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Phthalimide-based unfused-ring non-fullerene acceptors for constructing efficient organic solar cells with high open-circuit voltage
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-12-08 , DOI: 10.1039/d3nj05123d Baitian He 1 , Luting Tang 2 , Xiuhua Huang 1 , Jinming Zhang 1 , Manjun Xiao 2 , Guiting Chen 1 , Chuanbo Dai 1
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-12-08 , DOI: 10.1039/d3nj05123d Baitian He 1 , Luting Tang 2 , Xiuhua Huang 1 , Jinming Zhang 1 , Manjun Xiao 2 , Guiting Chen 1 , Chuanbo Dai 1
Affiliation
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Unfused-ring non-fullerene acceptors (UF-NFAs) have garnered substantial attention because of their simple chemical structure and easy synthesis, making them promising candidates for advancing the application of organic solar cells (OSCs). The design and synthesis of UF-NFAs with upshifted lowest unoccupied molecular orbitals (LUMOs) can improve the open-circuit voltage (VOC) and thus the photovoltaic performance of devices. Herein, we developed three UF-NFAs, namely, BPD-H, BPD-F, and BPD-Cl, using the phthalimide electron-deficient unit as the building block. Because of the stronger electron-withdrawing effect of chlorine atoms, BPD-Cl exhibited higher molar extinction coefficients and red-shifted absorption than BPD-H or BPD-F. Additionally, the PM6:BPD-Cl-based blended film displayed highly efficient exciton separation, better charge transportation, and an appropriate active layer morphology. Thus, PM6:BPD-Cl-based OSCs achieved a higher PCE of 10.72%, outperforming PM6:BPD-H-based (6.44%) and PM6:BPD-F-based (7.98%) devices. Our findings indicate that choosing the phthalimide electron-deficient unit as the building block and modifying terminal groups are promising strategies for fabricating efficient UF-NFAs.
中文翻译：
基于邻苯二甲酰亚胺的非稠环非富勒烯受体用于构建具有高开路电压的高效有机太阳能电池
非稠环非富勒烯受体（UF-NFA）因其简单的化学结构和易于合成而受到广泛关注，使其成为推进有机太阳能电池（OSC）应用的有希望的候选者。设计和合成具有上移最低未占分子轨道（LUMO）的UF-NFA可以提高开路电压（VOC< a i=3>)，从而影响器件的光伏性能。在此，我们使用邻苯二甲酰亚胺缺电子单元作为构建块开发了三种UF-NFA，即BPD-H、BPD-F和BPD-Cl。由于氯原子更强的吸电子效应，BPD-Cl比BPD-H或BPD-F表现出更高的摩尔消光系数和红移吸收。此外，PM6:BPD-Cl基共混薄膜表现出高效的激子分离、更好的电荷传输和适当的活性层形貌。因此，基于PM6:BPD-Cl的OSC实现了10.72%的更高PCE，优于基于PM6:BPD-H（6.44%）和基于PM6:BPD-F（7.98%）的器件。我们的研究结果表明，选择邻苯二甲酰亚胺缺电子单元作为构建块并修饰末端基团是制造高效UF-NFA的有前途的策略。
更新日期：2023-12-08
中文翻译：
基于邻苯二甲酰亚胺的非稠环非富勒烯受体用于构建具有高开路电压的高效有机太阳能电池
非稠环非富勒烯受体（UF-NFA）因其简单的化学结构和易于合成而受到广泛关注，使其成为推进有机太阳能电池（OSC）应用的有希望的候选者。设计和合成具有上移最低未占分子轨道（LUMO）的UF-NFA可以提高开路电压（VOC< a i=3>)，从而影响器件的光伏性能。在此，我们使用邻苯二甲酰亚胺缺电子单元作为构建块开发了三种UF-NFA，即BPD-H、BPD-F和BPD-Cl。由于氯原子更强的吸电子效应，BPD-Cl比BPD-H或BPD-F表现出更高的摩尔消光系数和红移吸收。此外，PM6:BPD-Cl基共混薄膜表现出高效的激子分离、更好的电荷传输和适当的活性层形貌。因此，基于PM6:BPD-Cl的OSC实现了10.72%的更高PCE，优于基于PM6:BPD-H（6.44%）和基于PM6:BPD-F（7.98%）的器件。我们的研究结果表明，选择邻苯二甲酰亚胺缺电子单元作为构建块并修饰末端基团是制造高效UF-NFA的有前途的策略。
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