Here, the potential of pyrrolo[3,4-c]pyrrole-1,3(2H,5H)-dione-based polymers, namely, poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene-alt-2,5-dioctyl-4,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,3(2H,5H)-dione) (PBDPD), is tested as an electron donor in nonfullerene electron acceptor-based organic solar cells (NFA OSCs). Polymer PBDPD shows an intense absorption between 300 and 600 nm with a deeper highest occupied molecular orbital of −5.44 eV. Noticeably, PBDPD displays good complementary absorption and well-matched energy levels with various NFAs. The binary NFA OSCs are fabricated by using PBDPD without any additive or postannealing treatment, providing a maximum power conversion efficiency (PCE) of 11.24% with an impressive open-circuit voltage (V_oc) of 1.004 V and a low energy loss (E_loss) of 0.496 eV. These results suggest that PBDPD could be a useful candidate for tandem NFA OSCs. Therefore, the tandem NFA OSCs are fabricated using PBDPD with the aim of further maximizing the V_oc of the NFA OSCs. The respective tandem NFA OSCs provide an impressive PCE of 15.71% with a greatly improved V_oc of 1.73 V. This study suggests that the PD-based polymers are efficient candidates for NFA OSCs, and it opens a new platform for researchers planning to develop efficient wide band-gap polymers for NFA OSCs.

中文翻译：

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吡咯并吡咯-1,3-二酮基宽禁带聚合物供体为高效二元和串联非富勒烯有机太阳能电池提供高电压和低能量损失，效率超过 15.7%

在这里，吡咯并[3,4- c ]pyrrole-1,3(2H,5H)-二酮基聚合物的潜力，即聚[4,8-双(5-(2-乙基己基)噻吩-2- yl)benzo[1,2-b:4,5-b']dithiophene-alt-2,5-dioctyl-4,6-di(thiophen-2-yl)pyrrolo[3,4- c ]pyrrole-1 ,3(2H,5H)-dione) ( PBDPD)被测试为基于非富勒烯电子受体的有机太阳能电池 (NFA OSC) 中的电子供体。聚合物PBDPD在 300 和 600 nm 之间显示出强烈的吸收，具有更深的最高占据分子轨道 -5.44 eV。值得注意的是，PBDPD显示出良好的互补吸收和与各种 NFA 良好匹配的能级。使用PBDPD制造二进制 NFA OSC无需任何添加剂或后退火处理，可提供 11.24% 的最大功率转换效率 (PCE)，具有 1.004 V 的令人印象深刻的开路电压 ( V _oc ) 和 0.496 eV 的低能量损耗 ( E _loss )。这些结果表明，PBDPD可能是串联 NFA OSC 的有用候选者。因此，串联 NFA OSC 是使用PBDPD制造的，目的是进一步最大化 NFA OSC 的V _oc。各自的串联 NFA OSC 提供了令人印象深刻的 15.71% 的 PCE，并大大提高了V _oc1.73 V。这项研究表明，基于 PD 的聚合物是 NFA OSC 的有效候选者，它为计划开发用于 NFA OSC 的高效宽带隙聚合物的研究人员打开了一个新平台。