Asymmetric Isomer Effects in Benzo[
<i>c</i>
][1,2,5]thiadiazole‐Fused Nonacyclic Acceptors: Dielectric Constant and Molecular Crystallinity Control for Significant Photovoltaic Performance Enhancement
作者:Wei Gao、Baobing Fan、Feng Qi、Francis Lin、Rui Sun、Xinxin Xia、Jinhua Gao、Cheng Zhong、Xinhui Lu、Jie Min、Fujun Zhang、Zonglong Zhu、Jingdong Luo、Alex K.‐Y. Jen
DOI:10.1002/adfm.202104369
日期:2021.9
Moreover, the weaker crystallization behavior enables a significantly enhanced miscibility between PM6 and ABP6T-4F than that between PM6 and BP6T-4F, which leads to an optimized micromorphology with smooth surface, suitable domain size, and ordered π–π stacking. Organic solar cells (OSCs) based on PM6:ABP6T-4F achieve a 15.8% power conversion efficiency (PCE), which is remarkably higher than that of
本文通过设计合成二苯并[ c]系统地探索了不对称异构体效应。][1,2,5] 噻二唑 (BT) 稠合非环电子受体。通过将 BP6T-4F 改为不对称 ABP6T-4F,可以显着提高介电常数并抑制过度分子聚集和不利的边缘取向。与具有相同能量偏移的 PM6:BP6T-4F 相比,降低的激子结合能也促进了 PM6:ABP6T-4F 中更有效的解离过程。此外,较弱的结晶行为使得 PM6 和 ABP6T-4F 之间的混溶性比 PM6 和 BP6T-4F 之间的混溶性显着提高,从而导致具有光滑表面、合适的域尺寸和有序 π-π 堆积的优化微形态。基于 PM6:ABP6T-4F 的有机太阳能电池 (OSC) 实现了 15.8% 的功率转换效率 (PCE),明显高于基于 PM6:BP6T-4F 的 OSC (6.4%)。此外,考虑到 ABP6T-4F 和 CH1007 之间的良好兼容性,还制造了三元器件,以提供超过