Abstract

The development of conjugated polymers with wide absorption spectra is imperative to achieve high efficiency in polymer solar cells (PSCs), since most of these polymers usually absorb only a limited range of the solar spectrum. Random terpolymers consisting of three blocks (one electron-donor and two electron-acceptor blocks) are promising p-type polymers for PSCs, because the inclusion of a third block in the polymer macromolecules provides a synergistic effect of physical properties, such as absorption capacity, charge transfer, HOMO/LUMO energy levels, and photovoltaic characteristics. In this regard, we have developed and synthesized random terpolymers consisting of two different chromophores (DPP and BFCTP) with complementary absorption spectra as co-acceptor blocks in conjugated donor–acceptor (D–A) copolymers. Random copolymers exhibit both broad absorption and low HOMO levels favoring short-circuit current and idle voltage in PSCs. It is expected that new terpolymers consisting of one electron-donor unit and two electron-acceptor moieties will make a significant contribution to the development of highly efficient PSCs. It is expected that new ternary copolymers consisting of one electron-donor unit and two electron-acceptor fragments will make a significant contribution to the development of high-performance PSСs.

中文翻译：

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具有300-1000 nm宽吸收光谱的新型供体-受体无规三元共聚物，用于光伏应用

摘要

为了在聚合物太阳能电池（PSC）中实现高效率，必须开发具有宽吸收光谱的共轭聚合物，因为大多数这些聚合物通常仅吸收有限范围的太阳光谱。由三个块（一个电子供体和两个电子受体块）无规三元共聚物是有前途的p用于PSC的C型聚合物，因为在聚合物大分子中包含第三个嵌段可提供物理特性（如吸收容量，电荷转移，HOMO / LUMO能级和光伏特性）的协同效应。在这方面，我们已经开发和合成了由两种不同的发色团（DPP和BFCTP）组成的无规三元共聚物，它们具有互补的吸收光谱，作为共轭给体-受体（DA）共聚物中的共受体嵌段。无规共聚物表现出宽吸收性和低HOMO含量，有利于PSC中的短路电流和闲置电压。预期由一个电子给体单元和两个电子受体部分组成的新三元共聚物将为高效PSC的发展做出重大贡献。