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Boron(III) β-diketonate-based small molecules for functional non-fullerene polymer solar cells and organic resistive memory devices
Chemical Science ( IF 7.6 ) Pub Date : 2020-10-08 , DOI: 10.1039/d0sc04047a Panpan Li 1 , Quanbin Liang 2 , Eugene Yau-Hin Hong 1 , Chin-Yiu Chan 1 , Yat-Hin Cheng 1 , Ming-Yi Leung 1 , Mei-Yee Chan 1 , Kam-Hung Low 1 , Hongbin Wu 2 , Vivian Wing-Wah Yam 1
Chemical Science ( IF 7.6 ) Pub Date : 2020-10-08 , DOI: 10.1039/d0sc04047a Panpan Li 1 , Quanbin Liang 2 , Eugene Yau-Hin Hong 1 , Chin-Yiu Chan 1 , Yat-Hin Cheng 1 , Ming-Yi Leung 1 , Mei-Yee Chan 1 , Kam-Hung Low 1 , Hongbin Wu 2 , Vivian Wing-Wah Yam 1
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A class of acceptor–donor–acceptor chromophoric small-molecule non-fullerene acceptors, 1–4, with difluoroboron(III) β-diketonate (BF2bdk) as the electron-accepting moiety has been developed. Through the variation of the central donor unit and the modification on the peripheral substituents of the terminal BF2bdk acceptor unit, their photophysical and electrochemical properties have been systematically studied. Taking advantage of their low-lying lowest unoccupied molecular orbital energy levels (from −3.65 to −3.72 eV) and relatively high electron mobility (7.49 × 10−4 cm2 V−1 s−1), these BF2bdk-based compounds have been employed as non-fullerene acceptors in organic solar cells with maximum power conversion efficiencies of up to 4.31%. Moreover, bistable resistive memory characteristics with charge-trapping mechanisms have been demonstrated in these BF2bdk-based compounds. This work not only demonstrates for the first time the use of a boron(III) β-diketonate unit in constructing non-fullerene acceptors, but also provides more insights into designing organic materials with multi-functional properties.
中文翻译：
用于功能性非富勒烯聚合物太阳能电池和有机电阻存储器件的硼(III) β-二酮基小分子
一类受体-供体-受体发色小分子非富勒烯受体，1-4，以二氟硼( III )β-二酮(BF 2 bdk)作为电子接受部分已被开发出来。通过中心供体单元的变化和末端BF 2 bdk受体单元外围取代基的修饰，系统地研究了它们的光物理和电化学性质。利用其低位最低未占据分子轨道能级（从-3.65到-3.72 eV）和相对较高的电子迁移率（7.49 × 10 -4 cm 2 V -1 s -1 ），这些BF 2 bdk基化合物已被用作有机太阳能电池中的非富勒烯受体，最大功率转换效率高达4.31%。此外，这些基于BF 2 bdk 的化合物已证明具有电荷捕获机制的双稳态电阻存储特性。这项工作不仅首次展示了硼( III )β-二酮单元在构建非富勒烯受体中的应用，而且为设计具有多功能特性的有机材料提供了更多见解。
更新日期：2020-10-08
中文翻译：
用于功能性非富勒烯聚合物太阳能电池和有机电阻存储器件的硼(III) β-二酮基小分子
一类受体-供体-受体发色小分子非富勒烯受体，1-4，以二氟硼( III )β-二酮(BF 2 bdk)作为电子接受部分已被开发出来。通过中心供体单元的变化和末端BF 2 bdk受体单元外围取代基的修饰，系统地研究了它们的光物理和电化学性质。利用其低位最低未占据分子轨道能级（从-3.65到-3.72 eV）和相对较高的电子迁移率（7.49 × 10 -4 cm 2 V -1 s -1 ），这些BF 2 bdk基化合物已被用作有机太阳能电池中的非富勒烯受体，最大功率转换效率高达4.31%。此外，这些基于BF 2 bdk 的化合物已证明具有电荷捕获机制的双稳态电阻存储特性。这项工作不仅首次展示了硼( III )β-二酮单元在构建非富勒烯受体中的应用，而且为设计具有多功能特性的有机材料提供了更多见解。
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